[2019-08] Fix time zone issue when jumping into DST #17027
Merged
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There is an issue with jumping into DST for some time zones when the incorrect date-time offset is returned for date-time in UTC (which comes from DateTime.Now). The fix is to just check if the incoming date-time is in UTC
Also I added set of tests for some time zones but they verify jumping into DST in general.
Fixes #16395
Backport of #16430