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ceMmDateTime.js
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ceMmDateTime.js
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// File: ceMmDateTime.js
// Description: Modern Myanmar Calendrical Calculations
//-------------------------------------------------------------------------
// WebSite: https://yan9a.github.io/mcal/
// MIT License (https://opensource.org/licenses/MIT)
// Copyright (c) 2018 Yan Naing Aye
// Doc: http://cool-emerald.blogspot.com/2013/06/algorithm-program-and-calculation-of.html
//-------------------------------------------------------------------------
class ceDateTime {
constructor(m_jd, m_tz, m_ct = 0, m_SG = 2361222) {
// 2361222 - Gregorian start in British calendar (1752/Sep/14)
if (m_tz == undefined) this.m_tz = ceDateTime.ltzoh();
else this.m_tz = m_tz;// time zone for this particular instance
if (m_jd == undefined) this.m_jd = ceDateTime.jdnow();
else this.m_jd = m_jd;// julian date in UTC
this.m_ct = m_ct; // calendar type [0=British (default), 1=Gregorian, 2=Julian]
this.m_SG = m_SG; // Beginning of Gregorian calendar in JDN [default=2361222]
}
//Start of core functions #############################################################
//-------------------------------------------------------------------------
//Julian date to Western date
//Credit4 Gregorian date: http://pmyers.pcug.org.au/General/JulianDates.htm
//Credit4 Julian Calendar: http://quasar.as.utexas.edu/BillInfo/JulianDatesG.html
//input: (jd:julian date,
// ct:calendar type [Optional argument: 0=British (default), 1=Gregorian, 2=Julian]
// SG: Beginning of Gregorian calendar in JDN [Optional argument: (default=2361222)])
//output: Western date (y=year, m=month, d=day, h=hour, n=minute, s=second)
static j2w(jd, ct = 0, SG = 2361222) {
// 2361222-Gregorian start in British calendar (1752/Sep/14)
var j, jf, y, m, d, h, n, s;
if (ct == 2 || (ct == 0 && (jd < SG))) {
var b, c, f, e;
j = Math.floor(jd + 0.5); jf = jd + 0.5 - j;
b = j + 1524; c = Math.floor((b - 122.1) / 365.25); f = Math.floor(365.25 * c);
e = Math.floor((b - f) / 30.6001); m = (e > 13) ? (e - 13) : (e - 1);
d = b - f - Math.floor(30.6001 * e); y = m < 3 ? (c - 4715) : (c - 4716);
}
else {
j = Math.floor(jd + 0.5); jf = jd + 0.5 - j; j -= 1721119;
y = Math.floor((4 * j - 1) / 146097); j = 4 * j - 1 - 146097 * y; d = Math.floor(j / 4);
j = Math.floor((4 * d + 3) / 1461); d = 4 * d + 3 - 1461 * j;
d = Math.floor((d + 4) / 4); m = Math.floor((5 * d - 3) / 153); d = 5 * d - 3 - 153 * m;
d = Math.floor((d + 5) / 5); y = 100 * y + j;
if (m < 10) { m += 3; }
else { m -= 9; y = y + 1; }
}
jf *= 24; h = Math.floor(jf); jf = (jf - h) * 60; n = Math.floor(jf); s = (jf - n) * 60;
return { y: y, m: m, d: d, h: h, n: n, s: s };
}
//-------------------------------------------------------------------------
//Time to Fraction of day starting from 12 noon
//input: (h=hour, n=minute, s=second) output: (d: fraction of day)
static t2d(h, n, s) { return ((h - 12) / 24 + n / 1440 + s / 86400); }
//-------------------------------------------------------------------------
//Western date to Julian date
//Credit4 Gregorian2JD: http://www.cs.utsa.edu/~cs1063/projects/Spring2011/Project1/jdn-explanation.html
//input: (y: year, m: month, d: day, h=hour, n=minute, s=second,
// ct:calendar type [Optional argument: 0=British (default), 1=Gregorian, 2=Julian]
// SG: Beginning of Gregorian calendar in JDN [Optional argument: (default=2361222)])
//output: Julian date
static w2j(y, m, d, h = 12, n = 0, s = 0, ct = 0, SG = 2361222) {
// 2361222-Gregorian start in British calendar (1752/Sep/14)
var a = Math.floor((14 - m) / 12); y = y + 4800 - a; m = m + (12 * a) - 3;
var jd = d + Math.floor((153 * m + 2) / 5) + (365 * y) + Math.floor(y / 4);
if (ct == 1) jd = jd - Math.floor(y / 100) + Math.floor(y / 400) - 32045;
else if (ct == 2) jd = jd - 32083;
else {
jd = jd - Math.floor(y / 100) + Math.floor(y / 400) - 32045;
if (jd < SG) {
jd = d + Math.floor((153 * m + 2) / 5) + (365 * y) + Math.floor(y / 4) - 32083;
if (jd > SG) jd = SG;
}
}
return jd + ceDateTime.t2d(h, n, s);
}
//-------------------------------------------------------------------------
// convert unix timestamp to jd
static u2j(ut) {
//number of seconds from 1970 Jan 1 00:00:00 (UTC)
var jd = 2440587.5 + ut / 86400.0;//converte to day(/24h/60min/60sec) and to JD
return jd;
}
//-------------------------------------------------------------------------
// julian date to unix time
static j2u(jd) {
return (jd - 2440587.5) * 86400.0 + 0.5;
}
//-------------------------------------------------------------------------
// get current time in julian date
static jdnow() {
var dt = new Date();
// the number of milliseconds since 1 January 1970 00:00:00 / 1000
var ut = dt.getTime() / 1000.0;
return ceDateTime.u2j(ut);
}
//-------------------------------------------------------------------------
// get local time zone offset between local time and UTC in days
static ltzoh() {
var dt = new Date();
// the difference, in minutes, between UTC and local time
var tz = dt.getTimezoneOffset() / 60.0;
return -tz; // between local time and UTC
}
//-------------------------------------------------------------------------
// jd to date time string
// input: (jd:julian date,
// fs: format string [Optional argument: "%Www %y-%mm-%dd %HH:%nn:%ss %zz"]
// tz : time zone offset in hours (e.g. 8 for GMT +8)
// ct:calendar type [Optional argument: 0=British (default), 1=Gregorian, 2=Julian]
// SG: Beginning of Gregorian calendar in JDN [Optional argument: (default=2361222)])
// output: date time string according to fm where formatting strings are as follows
// %yyyy : year [0000-9999, e.g. 2018]
// %yy : year [00-99 e.g. 18]
// %y : year [0-9999, e.g. 201]
// %MMM : month [e.g. JAN]
// %Mmm : month [e.g. Jan]
// %mm : month with zero padding [01-12]
// %M : month [e.g. January]
// %m : month [1-12]
// %dd : day with zero padding [01-31]
// %d : day [1-31]
// %HH : hour [00-23]
// %hh : hour [01-12]
// %H : hour [0-23]
// %h : hour [1-12]
// %AA : AM or PM
// %aa : am or pm
// %nn : minute with zero padding [00-59]
// %n : minute [0-59]
// %ss : second [00-59]
// %s : second [0-59]
// %lll : millisecond [000-999]
// %l : millisecond [0-999]
// %WWW : Weekday [e.g. SAT]
// %Www : Weekday [e.g. Sat]
// %W : Weekday [e.g. Saturday]
// %w : Weekday number [0=sat, 1=sun, ..., 6=fri]
// %zz : time zone (e.g. +08, +06:30)
static j2s(jd, fs = "%Www %y-%mm-%dd %HH:%nn:%ss %zz", tz = 0, ct = 0, SG = 2361222) {
jd += tz / 24.0;
var dt = ceDateTime.j2w(jd, ct, SG);
var s = Math.floor(dt.s);//shold not take round to make sure s<60
var l = Math.floor((dt.s - s) * 1000); // not rounding
var jdn = Math.floor(jd + 0.5);
var wd = (jdn + 2) % 7;//week day [0=sat, 1=sun, ..., 6=fri]
var h = dt.h % 12;
if (h == 0) h = 12;
var W = ["Saturday", "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday"];
var M = ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"];
// replace format string with values
var fm = fs; var fstr, rstr, re;
//--------------------------------------------------------
fstr = "%yyyy"; re = new RegExp(fstr, 'g');
rstr = "0000" + dt.y.toString(); rstr = rstr.substr(rstr.length - 4); fm = fm.replace(re, rstr);
//--------------------------------------------------------
fstr = "%yy"; var y = dt.y % 100; re = new RegExp(fstr, 'g');
rstr = "00" + y.toString(); rstr = rstr.substr(rstr.length - 2); fm = fm.replace(re, rstr);
//--------------------------------------------------------
fstr = "%y"; re = new RegExp(fstr, 'g');
rstr = dt.y.toString(); fm = fm.replace(re, rstr);
//--------------------------------------------------------
fstr = "%MMM"; re = new RegExp(fstr, 'g');
rstr = M[dt.m - 1]; rstr = rstr.substr(0, 3); rstr = rstr.toUpperCase(); fm = fm.replace(re, rstr);
//--------------------------------------------------------
fstr = "%Mmm"; re = new RegExp(fstr, 'g');
rstr = M[dt.m - 1]; rstr = rstr.substr(0, 3); fm = fm.replace(re, rstr);
//--------------------------------------------------------
fstr = "%mm"; re = new RegExp(fstr, 'g');
rstr = "00" + dt.m.toString(); rstr = rstr.substr(rstr.length - 2); fm = fm.replace(re, rstr);
//--------------------------------------------------------
fstr = "%M"; re = new RegExp(fstr, 'g');
rstr = M[dt.m - 1]; fm = fm.replace(re, rstr);
//--------------------------------------------------------
fstr = "%m"; re = new RegExp(fstr, 'g');
rstr = dt.m.toString(); fm = fm.replace(re, rstr);
//--------------------------------------------------------
fstr = "%dd"; re = new RegExp(fstr, 'g');
rstr = "00" + dt.d.toString(); rstr = rstr.substr(rstr.length - 2); fm = fm.replace(re, rstr);
//--------------------------------------------------------
fstr = "%d"; re = new RegExp(fstr, 'g');
rstr = dt.d.toString(); fm = fm.replace(re, rstr);
//--------------------------------------------------------
fstr = "%HH"; re = new RegExp(fstr, 'g');
rstr = "00" + dt.h.toString(); rstr = rstr.substr(rstr.length - 2); fm = fm.replace(re, rstr);
//--------------------------------------------------------
fstr = "%H"; re = new RegExp(fstr, 'g');
rstr = dt.h.toString(); fm = fm.replace(re, rstr);
//--------------------------------------------------------
fstr = "%hh"; re = new RegExp(fstr, 'g');
rstr = "00" + h.toString(); rstr = rstr.substr(rstr.length - 2); fm = fm.replace(re, rstr);
//--------------------------------------------------------
fstr = "%h"; re = new RegExp(fstr, 'g');
rstr = h.toString(); fm = fm.replace(re, rstr);
//--------------------------------------------------------
fstr = "%AA"; re = new RegExp(fstr, 'g');
rstr = dt.h < 12 ? "AM" : "PM"; fm = fm.replace(re, rstr);
//--------------------------------------------------------
fstr = "%aa"; re = new RegExp(fstr, 'g');
rstr = dt.h < 12 ? "am" : "pm"; fm = fm.replace(re, rstr);
//--------------------------------------------------------
fstr = "%nn"; re = new RegExp(fstr, 'g');
rstr = "00" + dt.n.toString(); rstr = rstr.substr(rstr.length - 2); fm = fm.replace(re, rstr);
//--------------------------------------------------------
fstr = "%n"; re = new RegExp(fstr, 'g');
rstr = dt.n.toString(); fm = fm.replace(re, rstr);
//--------------------------------------------------------
fstr = "%ss"; re = new RegExp(fstr, 'g');
rstr = "00" + s.toString(); rstr = rstr.substr(rstr.length - 2); fm = fm.replace(re, rstr);
//--------------------------------------------------------
fstr = "%s"; re = new RegExp(fstr, 'g');
rstr = s.toString(); fm = fm.replace(re, rstr);
//--------------------------------------------------------
fstr = "%lll"; re = new RegExp(fstr, 'g');
rstr = "000" + l.toString(); rstr = rstr.substr(rstr.length - 3); fm = fm.replace(re, rstr);
//--------------------------------------------------------
fstr = "%l"; re = new RegExp(fstr, 'g');
rstr = l.toString(); fm = fm.replace(re, rstr);
//--------------------------------------------------------
fstr = "%WWW"; re = new RegExp(fstr, 'g');
rstr = W[wd]; rstr = rstr.substr(0, 3); rstr = rstr.toUpperCase(); fm = fm.replace(re, rstr);
//--------------------------------------------------------
fstr = "%Www"; re = new RegExp(fstr, 'g');
rstr = W[wd]; rstr = rstr.substr(0, 3); fm = fm.replace(re, rstr);
//--------------------------------------------------------
fstr = "%W"; re = new RegExp(fstr, 'g');
rstr = W[wd]; fm = fm.replace(re, rstr);
//--------------------------------------------------------
fstr = "%w"; re = new RegExp(fstr, 'g');
rstr = wd.toString(); fm = fm.replace(re, rstr);
//--------------------------------------------------------
fstr = "%zz"; re = new RegExp(fstr, 'g');
var tzs = tz < 0 ? "-" : "+";
var tzi = Math.floor(tz);
var tzh = "00" + tzi.toString();
tzh = tzh.substr(tzh.length - 2);
rstr = tzs + tzh;
var tzf = tz - tzi;
if (tzf > 0) {
tzh = "00" + Math.floor(tzf * 60.0 + 0.5).toString();
tzh = tzh.substr(tzh.length - 2);
rstr += ":" + tzh;
}
fm = fm.replace(re, rstr);
//--------------------------------------------------------
return fm;
}
//-------------------------------------------------------------------------
// convert date time string to jd
// inputs
// tstr : time string
// accepts following formats
// 1: yyyy-mm-dd hh:nn:ss
// 2: yyyy-mm-dd hh:nn:ss.ttt
// 3: yyyymmddhhnnss
// 4: yyyymmddhhnnssttt
// 5: yyyy-mm-dd (default time is 12:00:00)
// 6: yyyymmdd (default time is 12:00:00)
// tz : time zone offset in hours
// [optional argument: 0 - UTC]
// ct:calendar type [Optional argument: 0=British (default), 1=Gregorian, 2=Julian]
// SG: Beginning of Gregorian calendar in JDN [Optional argument: (default=2361222)])
// output
// jd: julian date
// positive integer: ok
// -1 : error
static s2j(tstr, tz = 0, ct = 0, SG = 2361222) {
var str, pstr;
var y = 0, m = 0, d = 0, h = 12, n = 0, s = 0, ls = 0;
var jd = -1;
str = ceDateTime.GetDigits(tstr);
if (str.length == 8 || str.length == 14 || str.length == 17) {
pstr = str.substr(0, 4); y = parseInt(pstr); //get year
pstr = str.substr(4, 2); m = parseInt(pstr); //get month
pstr = str.substr(6, 2); d = parseInt(pstr); //get day
if (str.length == 14 || str.length == 17) {
pstr = str.substr(8, 2); h = parseInt(pstr); //get hour
pstr = str.substr(10, 2); n = parseInt(pstr); //get minute
pstr = str.substr(12, 2); s = parseInt(pstr); //get second
if (str.length == 17) {
pstr = str.substr(14, 3); ls = parseInt(pstr);
s += ls / 1000.0;
}
}
jd = ceDateTime.w2j(y, m, d, h, n, s, ct, SG) - tz / 24.0; // convert to UTC
}
return jd;
}
//-------------------------------------------------------------------------
// set time zone in hours for this instance
SetTimezone(tz)//set time zone
{
if (tz == undefined) { this.m_tz = ceDateTime.ltzoh(); }
else if (tz <= 14 || tz >= (-12)) { this.m_tz = tz; }
}
//-------------------------------------------------------------------------
// set time to now
Set2Now() {
this.m_jd = ceDateTime.jdnow();
}
//-------------------------------------------------------------------------
// set time in jd
SetJD(jd) {
this.m_jd = jd;
}
//-------------------------------------------------------------------------
// set in unix time
SetUnixTime(ut) {
this.m_jd = ceDateTime.u2j(ut);
}
//-------------------------------------------------------------------------
// set date time for a timezone and a calendar type
// timezone and calendar type won't be affected (tz and ct remain unchanged)
SetDateTime(year, month, day, hour = 12, minute = 0, second = 0, tz = 0, ct = 0, SG = 2361222) {
this.m_jd = ceDateTime.w2j(year, month, day, hour, minute, second, ct, SG) - tz / 24.0;
}
//-------------------------------------------------------------------------
// set time using a date time string
// inputs
// tstr : time string
// accepts following formats
// 1: yyyy-mm-dd hh:nn:ss
// 2: yyyy-mm-dd hh:nn:ss.ttt
// 3: yyyymmddhhnnss
// 4: yyyymmddhhnnssttt
// tz : time zone offset in hours
// [optional argument: 0 - UTC]
// ct:calendar type [Optional argument: 0=British (default), 1=Gregorian, 2=Julian]
// SG: Beginning of Gregorian calendar in JDN [Optional argument: (default=2361222)])
SetDateTimeString(tstr, tz = 0, ct = 0, SG = 2361222) {
var jd = ceDateTime.s2j(tstr, tz, ct, SG);
if (jd >= 0) this.m_jd = jd;
}
//-------------------------------------------------------------------------
// set calendar type [0=British (default), 1=Gregorian, 2=Julian]
SetCT(ct) {
ct = Math.round(ct % 3);
this.m_ct = ct;
}
//-------------------------------------------------------------------------
// set Beginning of Gregorian calendar in JDN [default=2361222]
SetSG(sg) {
sg = Math.round(sg);
this.m_SG = sg;
}
//-------------------------------------------------------------------------
// Get Date Time string
// input: (fs: format string [Optional argument: "%Www %y-%mm-%dd %HH:%nn:%ss %zz"])
// output: date time string according to fm where formatting strings are as follows
// %yyyy : year [0000-9999, e.g. 2018]
// %yy : year [00-99 e.g. 18]
// %y : year [0-9999, e.g. 201]
// %MMM : month [e.g. JAN]
// %Mmm : month [e.g. Jan]
// %mm : month with zero padding [01-12]
// %M : month [e.g. January]
// %m : month [1-12]
// %dd : day with zero padding [01-31]
// %d : day [1-31]
// %HH : hour [00-23]
// %hh : hour [01-12]
// %H : hour [0-23]
// %h : hour [1-12]
// %AA : AM or PM
// %aa : am or pm
// %nn : minute with zero padding [00-59]
// %n : minute [0-59]
// %ss : second [00-59]
// %s : second [0-59]
// %lll : millisecond [000-999]
// %l : millisecond [0-999]
// %WWW : Weekday [e.g. SAT]
// %Www : Weekday [e.g. Sat]
// %W : Weekday [e.g. Saturday]
// %w : Weekday number [0=sat, 1=sun, ..., 6=fri]
// %zz : time zone (e.g. +08, +06:30)
ToString(fs = "%Www %y-%mm-%dd %HH:%nn:%ss %zz") {
return ceDateTime.j2s(this.m_jd, fs, this.m_tz, this.m_ct, this.m_SG);
}
//-------------------------------------------------------------------------
// filter input string to get digits only
static GetDigits(str) {
var ostr = ""; var len = str.length; var i = 0;
if (len > 0) { for (i = 0; i < len; i++) if (str[i] >= '0' && str[i] <= '9') ostr += str[i]; }
return ostr;
}
//-------------------------------------------------------------------------
// get properties
get jd() { return this.m_jd; } // julian date
get jdl() { return (this.m_jd + this.m_tz / 24.0); } // julian date for this time zone
get jdn() { return Math.round(this.m_jd); } // julian date number
get jdnl() { return Math.round(this.m_jd + this.m_tz / 24.0); } // julian date number for this time zone
get y() {
var dt = ceDateTime.j2w(this.jdl, this.m_ct, this.m_SG);
return dt.y;
} // year
get m() {
var dt = ceDateTime.j2w(this.jdl, this.m_ct, this.m_SG);
return dt.m;
} // month
get d() {
var dt = ceDateTime.j2w(this.jdl, this.m_ct, this.m_SG);
return dt.d;
} // day
get h() {
var dt = ceDateTime.j2w(this.jdl, this.m_ct, this.m_SG);
return dt.h;
} // hour [0-23]
get n() {
var dt = ceDateTime.j2w(this.jdl, this.m_ct, this.m_SG);
return dt.n;
} // minute
get s() {
var dt = ceDateTime.j2w(this.jdl, this.m_ct, this.m_SG);
var s = Math.floor(dt.s);//shold not take round to make sure s<60
return s;
} // second
get l() {
var dt = ceDateTime.j2w(this.jdl, this.m_ct, this.m_SG);
var s = Math.floor(dt.s);//shold not take round to make sure s<60
var l = Math.floor((dt.s - s) * 1000); // not rounding
return l;
} // millisecond
get w() { return (this.jdnl + 2) % 7; } // weekday [0=sat, 1=sun, ..., 6=fri]
get ut() { return ceDateTime.j2u(this.m_jd); } // unix time
get tz() { return this.m_tz; } // time zone
get ct() { return this.m_ct; } // calendar type
get SG() { return this.m_SG; } // Beginning of Gregorian calendar in JDN [default=2361222]
get mlen() { return ceDateTime.wml(this.y, this.m, this.m_ct, this.m_SG); } // length of this month
//----------------------------------------------------------------------------
// find the length of western month
// input: (y=year, m=month [Jan=1, ... , Dec=12],
// ct:calendar type [Optional argument: 0=British (default), 1=Gregorian, 2=Julian])
// SG: Beginning of Gregorian calendar in JDN [Optional argument: (default=2361222)])
// output: (wml = length of the month)
static wml(y, m, ct = 0, SG = 2361222) {
var j1, j2; var m2 = m + 1; var y2 = y;
if (m2 > 12) { y2++; m2 %= 12; }
j1 = ceDateTime.w2j(y, m, 1, 12, 0, 0, ct, SG);
j2 = ceDateTime.w2j(y2, m2, 1, 12, 0, 0, ct, SG);
return (j2 - j1);
}
//-------------------------------------------------------------------------
} //ceDateTime
//-------------------------------------------------------------------------
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//-------------------------------------------------------------------------
class ceMmDateTime extends ceDateTime {
//-------------------------------------------------------------------------
constructor(m_jd, m_tz, m_ct = 0, m_SG = 2361222) {
super(m_jd, m_tz, m_ct, m_SG);
}
//-------------------------------------------------------------------------
// Get Myanmar year constants depending on era
// Thanks to Myo Zarny and Wunna Ko for earlier Myanmar years data
// input: my = myanmar year
// output:
// EI = Myanmar calendar era id [1-3] : calculations methods/constants depends on era
// WO = watat offset to compensate
// NM = number of months to find excess days
// EW = exception in watat year
static GetMyConst(my) {
var EI, WO, NM, EW = 0, i; var fme, wte;
// The third era (the era after Independence 1312 ME and after)
if (my >= 1312) {
EI = 3; WO = -0.5; NM = 8;
fme = [[1377, 1]];
wte = [1344, 1345];
}
// The second era (the era under British colony: 1217 ME - 1311 ME)
else if (my >= 1217) {
EI = 2; WO = -1; NM = 4;
fme = [[1234, 1], [1261, -1]];
wte = [1263, 1264];
}
// The first era (the era of Myanmar kings: ME1216 and before)
// Thandeikta (ME 1100 - 1216)
else if (my >= 1100) {
EI = 1.3; WO = -0.85; NM = -1;
fme = [[1120, 1], [1126, -1], [1150, 1], [1172, -1], [1207, 1]];
wte = [1201, 1202];
}
// Makaranta system 2 (ME 798 - 1099)
else if (my >= 798) {
EI = 1.2; WO = -1.1; NM = -1;
fme = [[813, -1], [849, -1], [851, -1], [854, -1], [927, -1], [933, -1], [936, -1],
[938, -1], [949, -1], [952, -1], [963, -1], [968, -1], [1039, -1]];
wte = [];
}
// Makaranta system 1 (ME 0 - 797)
else {
EI = 1.1; WO = -1.1; NM = -1;
fme = [[205, 1], [246, 1], [471, 1], [572, -1], [651, 1], [653, 2], [656, 1], [672, 1],
[729, 1], [767, -1]];
wte = [];
}
i = ceMmDateTime.bSearch2(my, fme); if (i >= 0) WO += fme[i][1]; // full moon day offset exceptions
i = ceMmDateTime.bSearch1(my, wte); if (i >= 0) EW = 1; //correct watat exceptions
return { EI: EI, WO: WO, NM: NM, EW: EW };
}
//----------------------------------------------------------------------------
// Search first dimension in a 2D array
// input: (k=key,A=array)
// output: (i=index)
static bSearch2(k, A) {
var i = 0; var l = 0; var u = A.length - 1;
while (u >= l) {
i = Math.floor((l + u) / 2);
if (A[i][0] > k) u = i - 1;
else if (A[i][0] < k) l = i + 1;
else return i;
} return -1;
}
//-----------------------------------------------------------------------------
// Search a 1D array
// input: (k=key,A=array)
// output: (i=index)
static bSearch1(k, A) {
var i = 0; var l = 0; var u = A.length - 1;
while (u >= l) {
i = Math.floor((l + u) / 2);
if (A[i] > k) u = i - 1;
else if (A[i] < k) l = i + 1;
else return i;
} return -1;
}
//-------------------------------------------------------------------------
// Check watat (intercalary month)
// input: (my = myanmar year)
// output: ( watat = intercalary month [1=watat, 0=common]
// fm = full moon day of 2nd Waso in jdn_mm (jdn+6.5 for MMT) [only valid when watat=1])
// dependency: GetMyConst(my)
static cal_watat(my) {//get data for respective era
var SY = 1577917828.0 / 4320000.0; //solar year (365.2587565)
var LM = 1577917828.0 / 53433336.0; //lunar month (29.53058795)
var MO = 1954168.050623; //beginning of 0 ME for MMT
var c = ceMmDateTime.GetMyConst(my); // get constants for the corresponding calendar era
var TA = (SY / 12 - LM) * (12 - c.NM); //threshold to adjust
var ed = (SY * (my + 3739)) % LM; // excess day
if (ed < TA) ed += LM;//adjust excess days
var fm = Math.round(SY * my + MO - ed + 4.5 * LM + c.WO);//full moon day of 2nd Waso
var TW = 0, watat = 0;//find watat
if (c.EI >= 2) {//if 2nd era or later find watat based on excess days
TW = LM - (SY / 12 - LM) * c.NM;
if (ed >= TW) watat = 1;
}
else {//if 1st era,find watat by 19 years metonic cycle
//Myanmar year is divided by 19 and there is intercalary month
//if the remainder is 2,5,7,10,13,15,18
//https://github.com/kanasimi/CeJS/blob/master/data/date/calendar.js#L2330
watat = (my * 7 + 2) % 19; if (watat < 0) watat += 19;
watat = Math.floor(watat / 12);
}
watat ^= c.EW;//correct watat exceptions
return { fm: fm, watat: watat };
}
//-------------------------------------------------------------------------
// Check Myanmar Year
// input: (my -myanmar year)
// output: (myt =year type [0=common, 1=little watat, 2=big watat],
// tg1 = the 1st day of Tagu as jdn_mm (Julian Day Number for MMT)
// fm = full moon day of [2nd] Waso as Julain Day Number
// werr= watat discrepancy [0=ok, 1= error] )
// dependency: cal_watat(my)
static cal_my(my) {
var yd = 0, y1, nd = 0, werr = 0, fm = 0;
var y2 = ceMmDateTime.cal_watat(my); var myt = y2.watat;
do { yd++; y1 = ceMmDateTime.cal_watat(my - yd); } while (y1.watat == 0 && yd < 3);
if (myt) {
nd = (y2.fm - y1.fm) % 354; myt = Math.floor(nd / 31) + 1;
fm = y2.fm; if (nd != 30 && nd != 31) { werr = 1; }
}
else fm = y1.fm + 354 * yd;
var tg1 = y1.fm + 354 * yd - 102;
return { myt: myt, tg1: tg1, fm: fm, werr: werr };
}
//-------------------------------------------------------------------------
// Julian day number to Myanmar date
// input: (jdn -julian day number)
// output: (
// myt =year type [0=common, 1=little watat, 2=big watat],
// my = year,
// mm = month [Tagu=1, Kason=2, Nayon=3, 1st Waso=0, (2nd) Waso=4, Wagaung=5,
// Tawthalin=6, Thadingyut=7, Tazaungmon=8, Nadaw=9, Pyatho=10, Tabodwe=11,
// Tabaung=12, Late Tagu=13, Late Kason=14 ],
// md = day of the month [1 to 30])
// dependency: cal_my(my)
static j2m(jdn) {
jdn = Math.round(jdn);//convert jdn to integer
var SY = 1577917828.0 / 4320000.0; //solar year (365.2587565)
var MO = 1954168.050623; //beginning of 0 ME
var my, yo, dd, myl, mmt, a, b, c, e, f, mm, md;
my = Math.floor((jdn - 0.5 - MO) / SY);//Myanmar year
yo = ceMmDateTime.cal_my(my);//check year
dd = jdn - yo.tg1 + 1;//day count
b = Math.floor(yo.myt / 2); c = Math.floor(1 / (yo.myt + 1)); //big wa and common yr
myl = 354 + (1 - c) * 30 + b;//year length
mmt = Math.floor((dd - 1) / myl);//month type: late =1 or early = 0
dd -= mmt * myl; a = Math.floor((dd + 423) / 512); //adjust day count and threshold
mm = Math.floor((dd - b * a + c * a * 30 + 29.26) / 29.544);//month
e = Math.floor((mm + 12) / 16); f = Math.floor((mm + 11) / 16);
md = dd - Math.floor(29.544 * mm - 29.26) - b * e + c * f * 30;//day
mm += f * 3 - e * 4 + 12 * mmt; // adjust month numbers for late months
return { myt: yo.myt, my: my, mm: mm, md: md };
}
//-------------------------------------------------------------------------
// Get moon phase from day of the month, month, and year type.
// input: (
// md= day of the month [1-30],
// mm = month [Tagu=1, Kason=2, Nayon=3, 1st Waso=0, (2nd) Waso=4, Wagaung=5,
// Tawthalin=6, Thadingyut=7, Tazaungmon=8, Nadaw=9, Pyatho=10, Tabodwe=11,
// Tabaung=12, Late Tagu=13, Late Kason=14 ],
// myt = year type [0=common, 1=little watat, 2=big watat])
// output: (mp =moon phase [0=waxing, 1=full moon, 2=waning, 3=new moon])
static cal_mp(md, mm, myt) {
var mml = ceMmDateTime.cal_mml(mm, myt);
return (Math.floor((md + 1) / 16) + Math.floor(md / 16) + Math.floor(md / mml));
}
//-------------------------------------------------------------------------
// Get length of month from month, and year type.
// input: (
// mm = month [Tagu=1, Kason=2, Nayon=3, 1st Waso=0, (2nd) Waso=4, Wagaung=5,
// Tawthalin=6, Thadingyut=7, Tazaungmon=8, Nadaw=9, Pyatho=10, Tabodwe=11,
// Tabaung=12, Late Tagu=13, Late Kason=14 ],
// myt = year type [0=common, 1=little watat, 2=big watat])
// output: (mml = length of the month [29 or 30 days])
static cal_mml(mm, myt) {
var mml = 30 - mm % 2;//month length
if (mm == 3) mml += Math.floor(myt / 2);//adjust if Nayon in big watat
return mml;
}
//-------------------------------------------------------------------------
// Get the apparent length of the year from year type.
// input: ( myt = year type [0=common, 1=little watat, 2=big watat])
// output: ( myl= year length [354, 384, or 385 days])
static cal_myl(myt) {
return (354 + (1 - Math.floor(1 / (myt + 1))) * 30 + Math.floor(myt / 2));
}
//-------------------------------------------------------------------------
// Get fortnight day from month day
// input: ( md= day of the month [1-30])
// output: (mf= fortnight day [1 to 15])
static cal_mf(md) {
return (md - 15 * Math.floor(md / 16));
}
//-------------------------------------------------------------------------
// Get day of month from fortnight day, moon phase, and length of the month
// input: (
// mf = fortnight day [1 to 15],
// mp = moon phase [0=waxing, 1=full moon, 2=waning, 3=new moon]
// mm = month [Tagu=1, Kason=2, Nayon=3, 1st Waso=0, (2nd) Waso=4, Wagaung=5,
// Tawthalin=6, Thadingyut=7, Tazaungmon=8, Nadaw=9, Pyatho=10, Tabodwe=11,
// Tabaung=12, Late Tagu=13, Late Kason=14 ],
// myt = year type [0=common, 1=little watat, 2=big watat])
// output: ( md = day of the month [1-30])
static cal_md(mf, mp, mm, myt) {
var mml = ceMmDateTime.cal_mml(mm, myt);
var m1 = mp % 2; var m2 = Math.floor(mp / 2);
return (m1 * (15 + m2 * (mml - 15)) + (1 - m1) * (mf + 15 * m2));
}
//-------------------------------------------------------------------------
// Myanmar date to Julian day number
// input: (
// my = year,
// mm = month [Tagu=1, Kason=2, Nayon=3, 1st Waso=0, (2nd) Waso=4, Wagaung=5,
// Tawthalin=6, Thadingyut=7, Tazaungmon=8, Nadaw=9, Pyatho=10, Tabodwe=11,
// Tabaung=12 , Late Tagu=13, Late Kason=14 ],
// md = day of the month [1-30]
// output: (jd -julian day number)
// dependency: cal_my(my)
static m2j(my, mm, md) {
var b, c, dd, myl, mmt;
var yo = ceMmDateTime.cal_my(my);//check year
mmt = Math.floor(mm / 13); mm = mm % 13 + mmt; // to 1-12 with month type
b = Math.floor(yo.myt / 2); c = 1 - Math.floor((yo.myt + 1) / 2); //if big watat and common year
mm += 4 - Math.floor((mm + 15) / 16) * 4 + Math.floor((mm + 12) / 16);//adjust month
dd = md + Math.floor(29.544 * mm - 29.26) - c * Math.floor((mm + 11) / 16) * 30
+ b * Math.floor((mm + 12) / 16);
myl = 354 + (1 - c) * 30 + b; dd += mmt * myl;//adjust day count with year length
return (dd + yo.tg1 - 1);
}
//-------------------------------------------------------------------------
// set Myanmar date time for a timezone and a calendar type
// timezone and calendar type won't be affected (tz and ct remain unchanged)
// input: (
// my = year,
// mm = month [Tagu=1, Kason=2, Nayon=3, 1st Waso=0, (2nd) Waso=4, Wagaung=5,
// Tawthalin=6, Thadingyut=7, Tazaungmon=8, Nadaw=9, Pyatho=10, Tabodwe=11,
// Tabaung=12 , Late Tagu=13, Late Kason=14 ],
// md = day of the month [1-30]
// ... )
SetMDateTime(my, mm, md, hour = 12, minute = 0, second = 0, tz = 0) {
this.m_jd = ceMmDateTime.m2j(my, mm, md) + ceDateTime.t2d(hour, minute, second) - tz / 24.0;
}
//-------------------------------------------------------------------------
//Checking Astrological days
// More details @ http://cool-emerald.blogspot.sg/2013/12/myanmar-astrological-calendar-days.html
//-------------------------------------------------------------------------
// Get sabbath day and sabbath eve from day of the month, month, and year type.
// input: (
// md= day of the month [1-30],
// mm = month [Tagu=1, Kason=2, Nayon=3, 1st Waso=0, (2nd) Waso=4, Wagaung=5,
// Tawthalin=6, Thadingyut=7, Tazaungmon=8, Nadaw=9, Pyatho=10, Tabodwe=11,
// Tabaung=12, Late Tagu=13, Late Kason=14 ],
// myt = year type [0=common, 1=little watat, 2=big watat])
// output: ( [1=sabbath, 2=sabbath eve, 0=else])
static cal_sabbath(md, mm, myt) {
var mml = ceMmDateTime.cal_mml(mm, myt);
var s = 0; if ((md == 8) || (md == 15) || (md == 23) || (md == mml)) s = 1;
if ((md == 7) || (md == 14) || (md == 22) || (md == (mml - 1))) s = 2;
return s;
}
//-------------------------------------------------------------------------
// Get yatyaza from month, and weekday
// input: (
// mm = month [Tagu=1, Kason=2, Nayon=3, 1st Waso=0, (2nd) Waso=4, Wagaung=5,
// Tawthalin=6, Thadingyut=7, Tazaungmon=8, Nadaw=9, Pyatho=10, Tabodwe=11,
// Tabaung=12, Late Tagu=13, Late Kason=14 ],
// wd= weekday [0=sat, 1=sun, ..., 6=fri])
// output: ( [1=yatyaza, 0=else])
static cal_yatyaza(mm, wd) {
//first waso is considered waso
var m1 = mm % 4; var yatyaza = 0; var wd1 = Math.floor(m1 / 2) + 4;
var wd2 = ((1 - Math.floor(m1 / 2)) + m1 % 2) * (1 + 2 * (m1 % 2));
if ((wd == wd1) || (wd == wd2)) yatyaza = 1;
return yatyaza;
}
//-------------------------------------------------------------------------
// Get pyathada from month, and weekday
// input: (
// mm = month [Tagu=1, Kason=2, Nayon=3, 1st Waso=0, (2nd) Waso=4, Wagaung=5,
// Tawthalin=6, Thadingyut=7, Tazaungmon=8, Nadaw=9, Pyatho=10, Tabodwe=11,
// Tabaung=12, Late Tagu=13, Late Kason=14 ],
// wd= weekday [0=sat, 1=sun, ..., 6=fri])
// output: ( [1=pyathada, 2=afternoon pyathada, 0=else])
static cal_pyathada(mm, wd) {
//first waso is considered waso
var m1 = mm % 4; var pyathada = 0; var wda = [1, 3, 3, 0, 2, 1, 2];
if ((m1 == 0) && (wd == 4)) pyathada = 2;//afternoon pyathada
if (m1 == wda[wd]) pyathada = 1;
return pyathada;
}
//-------------------------------------------------------------------------
// nagahle
// input: (
// mm = month [Tagu=1, Kason=2, Nayon=3, 1st Waso=0, (2nd) Waso=4, Wagaung=5,
// Tawthalin=6, Thadingyut=7, Tazaungmon=8, Nadaw=9, Pyatho=10, Tabodwe=11,
// Tabaung=12, Late Tagu=13, Late Kason=14 ])
// output: ( [0=west, 1=north, 2=east, 3=south])
static cal_nagahle(mm) {
if (mm <= 0) mm = 4;//first waso is considered waso
return Math.floor((mm % 12) / 3);
}
//-------------------------------------------------------------------------
// mahabote
// input: (
// my = year,
// wd= weekday [0=sat, 1=sun, ..., 6=fri])
// output: ( [0=Binga, 1=Atun, 2=Yaza, 3=Adipati, 4= Marana, 5=Thike, 6=Puti])
static cal_mahabote(my, wd) { return (my - wd) % 7; }
//-------------------------------------------------------------------------
// nakhat
// input: ( my = year )
// output: ( [0=Ogre, 1=Elf, 2=Human] )
static cal_nakhat(my) { return my % 3; }
//-------------------------------------------------------------------------
// thamanyo
// input: (
// mm = month [Tagu=1, Kason=2, Nayon=3, 1st Waso=0, (2nd) Waso=4, Wagaung=5,
// Tawthalin=6, Thadingyut=7, Tazaungmon=8, Nadaw=9, Pyatho=10, Tabodwe=11,
// Tabaung=12, Late Tagu=13, Late Kason=14 ],
// wd= weekday [0=sat, 1=sun, ..., 6=fri])
// output: ( [1=thamanyo, 0=else])
static cal_thamanyo(mm, wd) {
var mmt = Math.floor(mm / 13); mm = mm % 13 + mmt; // to 1-12 with month type
if (mm <= 0) mm = 4;//first waso is considered waso (looks no need here)
var thamanyo = 0;
var m1 = mm - 1 - Math.floor(mm / 9);
var wd1 = (m1 * 2 - Math.floor(m1 / 8)) % 7;
var wd2 = (wd + 7 - wd1) % 7;
if (wd2 <= 1) thamanyo = 1;
return thamanyo;
}
//-------------------------------------------------------------------------
// Get amyeittasote
// input: (
// md= day of the month [1-30],
// wd= weekday [0=sat, 1=sun, ..., 6=fri])
// output: ( [1=amyeittasote, 0=else])
static cal_amyeittasote(md, wd) {
var mf = md - 15 * Math.floor(md / 16);//get fortnight day [0-15]
var amyeittasote = 0; var wda = [5, 8, 3, 7, 2, 4, 1];
if (mf == wda[wd]) amyeittasote = 1;
return amyeittasote;
}
//-------------------------------------------------------------------------
// Get warameittugyi
// input: (
// md= day of the month [1-30],
// wd= weekday [0=sat, 1=sun, ..., 6=fri])
// output: ( [1=warameittugyi, 0=else])
static cal_warameittugyi(md, wd) {
var mf = md - 15 * Math.floor(md / 16);//get fortnight day [0-15]
var warameittugyi = 0; var wda = [7, 1, 4, 8, 9, 6, 3];
if (mf == wda[wd]) warameittugyi = 1;
return warameittugyi;
}
//-------------------------------------------------------------------------
// Get warameittunge
// input: (
// md= day of the month [1-30],
// wd= weekday [0=sat, 1=sun, ..., 6=fri])
// output: ( [1=warameittunge, 0=else])
static cal_warameittunge(md, wd) {
var mf = md - 15 * Math.floor(md / 16);//get fortnight day [0-15]
var warameittunge = 0; var wn = (wd + 6) % 7;
if ((12 - mf) == wn) warameittunge = 1;
return warameittunge;
}
//-------------------------------------------------------------------------
// Get yatpote
// input: (
// md= day of the month [1-30],
// wd= weekday [0=sat, 1=sun, ..., 6=fri])
// output: ( [1=yatpote, 0=else])
static cal_yatpote(md, wd) {
var mf = md - 15 * Math.floor(md / 16);//get fortnight day [0-15]
var yatpote = 0; var wda = [8, 1, 4, 6, 9, 8, 7];
if (mf == wda[wd]) yatpote = 1;
return yatpote;
}
//-------------------------------------------------------------------------
// Get thamaphyu
// input: (
// md= day of the month [1-30],
// wd= weekday [0=sat, 1=sun, ..., 6=fri])
// output: ( [1=thamaphyu, 0=else])
static cal_thamaphyu(md, wd) {
var mf = md - 15 * Math.floor(md / 16);//get fortnight day [0-15]
var thamaphyu = 0; var wda = [1, 2, 6, 6, 5, 6, 7];
if (mf == wda[wd]) thamaphyu = 1;
var wdb = [0, 1, 0, 0, 0, 3, 3]; if (mf == wdb[wd]) thamaphyu = 1;
if ((mf == 4) && (wd == 5)) thamaphyu = 1;
return thamaphyu;
}
//-------------------------------------------------------------------------
// Get nagapor
// input: (
// md= day of the month [1-30],
// wd= weekday [0=sat, 1=sun, ..., 6=fri])
// output: ( [1=nagapor, 0=else])
static cal_nagapor(md, wd) {
var nagapor = 0; var wda = [26, 21, 2, 10, 18, 2, 21];
if (md == wda[wd]) nagapor = 1;
var wdb = [17, 19, 1, 0, 9, 0, 0]; if (md == wdb[wd]) nagapor = 1;
if (((md == 2) && (wd == 1)) || (((md == 12) || (md == 4) || (md == 18)) && (wd == 2))) nagapor = 1;
return nagapor;
}
//-------------------------------------------------------------------------
// yatyotema
// input: (
// mm = month [Tagu=1, Kason=2, Nayon=3, 1st Waso=0, (2nd) Waso=4, Wagaung=5,
// Tawthalin=6, Thadingyut=7, Tazaungmon=8, Nadaw=9, Pyatho=10, Tabodwe=11,
// Tabaung=12, Late Tagu=13, Late Kason=14 ],
// md= day of the month [1-30])
// output: ( [1=yatyotema, 0=else])
static cal_yatyotema(mm, md) {
var mmt = Math.floor(mm / 13); mm = mm % 13 + mmt; // to 1-12 with month type
if (mm <= 0) mm = 4;//first waso is considered waso
var mf = md - 15 * Math.floor(md / 16);//get fortnight day [0-15]
var yatyotema = 0; var m1 = (mm % 2) ? mm : ((mm + 9) % 12);
m1 = (m1 + 4) % 12 + 1; if (mf == m1) yatyotema = 1;
return yatyotema;
}
//-------------------------------------------------------------------------
// mahayatkyan
// input: (
// mm = month [Tagu=1, Kason=2, Nayon=3, 1st Waso=0, (2nd) Waso=4, Wagaung=5,
// Tawthalin=6, Thadingyut=7, Tazaungmon=8, Nadaw=9, Pyatho=10, Tabodwe=11,
// Tabaung=12, Late Tagu=13, Late Kason=14 ],
// md= day of the month [1-30])
// output: ( [1=mahayatkyan, 0=else])
static cal_mahayatkyan(mm, md) {
if (mm <= 0) mm = 4;//first waso is considered waso
var mf = md - 15 * Math.floor(md / 16);//get fortnight day [0-15]
var mahayatkyan = 0; var m1 = (Math.floor((mm % 12) / 2) + 4) % 6 + 1;
if (mf == m1) mahayatkyan = 1;
return mahayatkyan;
}
//-------------------------------------------------------------------------
// shanyat
// input: (
// mm = month [Tagu=1, Kason=2, Nayon=3, 1st Waso=0, (2nd) Waso=4, Wagaung=5,
// Tawthalin=6, Thadingyut=7, Tazaungmon=8, Nadaw=9, Pyatho=10, Tabodwe=11,
// Tabaung=12, Late Tagu=13, Late Kason=14 ],
// md= day of the month [1-30])
// output: ( [1=shanyat, 0=else])
static cal_shanyat(mm, md) {
var mmt = Math.floor(mm / 13); mm = mm % 13 + mmt; // to 1-12 with month type
if (mm <= 0) mm = 4;//first waso is considered waso
var mf = md - 15 * Math.floor(md / 16);//get fortnight day [0-15]
var shanyat = 0; var sya = [8, 8, 2, 2, 9, 3, 3, 5, 1, 4, 7, 4];
if (mf == sya[mm - 1]) shanyat = 1;
return shanyat;
}
//-------------------------------------------------------------------------
// get astrological information
// input: (jdn: Julian Day Number)
// output: (array of strings)
static cal_astro(jdn) {
jdn = Math.round(jdn);
var myt, my, mm, md; var hs = [];
var yo = ceMmDateTime.j2m(jdn);
myt = yo.myt; my = yo.my; mm = yo.mm; md = yo.md;
var wd = (jdn + 2) % 7;//week day [0=sat, 1=sun, ..., 6=fri]
if (ceMmDateTime.cal_thamanyo(mm, wd)) { hs.push("Thamanyo"); }
if (ceMmDateTime.cal_amyeittasote(md, wd)) { hs.push("Amyeittasote"); }
if (ceMmDateTime.cal_warameittugyi(md, wd)) { hs.push("Warameittugyi"); }
if (ceMmDateTime.cal_warameittunge(md, wd)) { hs.push("Warameittunge"); }
if (ceMmDateTime.cal_yatpote(md, wd)) { hs.push("Yatpote"); }
if (ceMmDateTime.cal_thamaphyu(md, wd)) { hs.push("Thamaphyu"); }
if (ceMmDateTime.cal_nagapor(md, wd)) { hs.push("Nagapor"); }
if (ceMmDateTime.cal_yatyotema(mm, md)) { hs.push("Yatyotema"); }
if (ceMmDateTime.cal_mahayatkyan(mm, md)) { hs.push("Mahayatkyan"); }
if (ceMmDateTime.cal_shanyat(mm, md)) { hs.push("Shanyat"); }
return hs;
}
// End of core functions ###############################################################
//-----------------------------------------------------------------------------
// Start of checking holidays ##################################################
//-----------------------------------------------------------------------------
// Get holidays
// input: (jdn=Julian Day Number)
// output: ( array of strings)
// Thanks to Ye Lin Kyaw and Aye Nyein for the knowledge about
// the Myanmar calendar and the new year
static cal_holiday(jdn) {
jdn = Math.round(jdn);
var myt, my, mm, md, mp, mmt, gy, gm, gd;
var yo = ceMmDateTime.j2m(jdn);
myt = yo.myt; my = yo.my; mm = yo.mm; md = yo.md;
mp = ceMmDateTime.cal_mp(md, mm, myt);
mmt = Math.floor(mm / 13); var hs = [];
var go = ceDateTime.j2w(jdn);
gy = go.y; gm = go.m; gd = go.d;
//---------------------------------
// Thingyan
var SY = 1577917828.0 / 4320000.0; //solar year (365.2587565)
var MO = 1954168.050623; //beginning of 0 ME
var BGNTG = 1100, SE3 = 1312;//start of Thingyan and third era
var akn, atn, ja, jk;
ja = SY * (my + mmt) + MO; // atat time
if (my >= SE3) jk = ja - 2.169918982; // akya time
else jk = ja - 2.1675;
akn = Math.round(jk); atn = Math.round(ja);
if (jdn == (atn + 1)) { hs.push("Myanmar New Year's Day"); }
if ((my + mmt) >= BGNTG) {
if (jdn == atn) { hs.push("Thingyan Atat"); }
else if ((jdn > akn) && (jdn < atn)) { hs.push("Thingyan Akyat"); }
else if (jdn == akn) { hs.push("Thingyan Akya"); }
else if (jdn == (akn - 1)) { hs.push("Thingyan Akyo"); }
else if (((my + mmt) >= 1369) && ((my + mmt) < 1379) && ((jdn == (akn - 2)) ||
((jdn >= (atn + 2)) && (jdn <= (akn + 7))))) {
hs.push("Holiday");
}
else if ((((my + mmt) >= 1384) && (my + mmt) <= 1385)
&& ((jdn == (akn - 5)) || (jdn == (akn - 4)) || (jdn == (akn - 3)) || (jdn == (akn - 2)))) {
hs.push("Holiday");
} else if ((my + mmt) >= 1386
&& (((jdn >= (atn + 2)) && (jdn <= (akn + 7))))) {
hs.push("Holiday");
}
}
//---------------------------------
// holidays on gregorian calendar
if ((gy >= 2018 && gy <= 2021) && (gm == 1) && (gd == 1)) { hs.push("New Year's Day"); }
else if ((gy >= 1948) && (gm == 1) && (gd == 4)) { hs.push("Independence Day"); }
else if ((gy >= 1947) && (gm == 2) && (gd == 12)) { hs.push("Union Day"); }
else if ((gy >= 1958) && (gm == 3) && (gd == 2)) { hs.push("Peasants' Day"); }
else if ((gy >= 1945) && (gm == 3) && (gd == 27)) { hs.push("Resistance Day"); }
else if ((gy >= 1923) && (gm == 5) && (gd == 1)) { hs.push("Labour Day"); }
else if ((gy >= 1947) && (gm == 7) && (gd == 19)) { hs.push("Martyrs' Day"); }
else if ((gy >= 1752) && (gm == 12) && (gd == 25)) { hs.push("Christmas Day"); }
else if ((gy == 2017) && (gm == 12) && (gd == 30)) { hs.push("Holiday"); }
else if ((gy >= 2017 && gy <= 2021) && (gm == 12) && (gd == 31)) { hs.push("Holiday"); }
//---------------------------------
// holidays on myanmar calendar
if ((mm == 2) && (mp == 1)) { hs.push("Buddha Day"); }//Vesak day
else if ((mm == 4) && (mp == 1)) { hs.push("Start of Buddhist Lent"); }//Warso day