It would be useful to have a Synergy subroutine/function that could provide information as to what Time, or TimeZone offset prevailed for location as of a specific UTC Date and Time.
For example, pass:
UTC Date: 11/05/2020,
UTC Time: 14:23:17
Locality: Connecticut (or GPS coordinates, or something)
The offset between the UTC and local time for that Date/Time, or
the actual Date/Time for that locality for the specified UTC Date/Time
The issue is that when one has a UTC time that is not the current date/time (even if it's stale by only a few seconds), and needs to convert that into the local time that was applicable for that UTC date/time, one needs to know whether Standard or Daylight Savings Time applied for the Location, Date and Time in question.