The best practice to work with “datetime” with UTC timezone?

1

What would be the the best practice to work with “datetime” with UTC timezone?
I am getting “datetime” from server with “yyyy-MM-ddTHH:mm:ss-0X:00” format and updating to another server on different timezone.
The sourceserver and easyMorph server and destination server are all in different time zone.

2

These two functions should help convert timestamps to/from UTC:

localtime()
utctime()