Pleased to see that Dart is quite sane in its API and dates/times carry around the time zone.
I still get frustrated because after many years I still have to deal with date times without a timezone in Python. From the standard library:
>>> import datetime
datetime.datetime(2018, 9, 15, 1, 51, 58, 769069)
datetime.datetime(2018, 9, 14, 23, 52, 4, 568886)
Neither the local time, now(), nor the UTC time carry the time zone so if you pass that around you're bound to mess it up, they call those "naive datetimes" vs "time zone aware datetimes" but I call them "useless datetimes" :D
No wonder Python has so many datetime libraries (each word links to a different library :D)
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