Date formats confusing

[SimonRWaters]

The notification uses "toString" and the HTTP response string for dates, which may be in different time zones and different ordering of components. Line 122

"The payload was sent at Fri Nov 16 06:58:00 GMT 2018 and received on 2018-Nov-16 14:59:12 UTC" - it takes too much mental effort to decide these were on the same day.

"yyyy-MMM-dd HH:mm:ss z" I think is the simple date format string for the Java date.