timeZoneOffset property Null safety

The time zone offset, which is the difference between local time and UTC.

The offset is positive for time zones east of UTC.

Note, that JavaScript, Python and C return the difference between UTC and local time. Java, C# and Ruby return the difference between local time and UTC.

For example, using local time in San Francisco, United States:

final dateUS = DateTime.parse('2021-11-01 20:18:04Z').toLocal();
print(dateUS); // 2021-11-01 13:18:04.000
print(dateUS.timeZoneName); // PDT ( Pacific Daylight Time )
print(dateUS.timeZoneOffset.inHours); // -7
print(dateUS.timeZoneOffset.inMinutes); // -420

For example, using local time in Canberra, Australia:

final dateAus = DateTime.parse('2021-11-01 20:18:04Z').toLocal();
print(dateAus); // 2021-11-02 07:18:04.000
print(dateAus.timeZoneName); // AEDT ( Australian Eastern Daylight Time )
print(dateAus.timeZoneOffset.inHours); // 11
print(dateAus.timeZoneOffset.inMinutes); // 660