firebase time to flutter datetime code example
Example: datetimeoffset flutter
// DateTime can only represent local time and UTC time.
// It supports timezone offset for parsing, but normalizes it to UTC
print(DateTime.parse('2018-09-07T17:29:12+02:00').isUtc);
// prints true.
//You can then only convert between local and UTC time using:
// toLocal() or toUtc()