hour property

int hour

The hour of the day, expressed as in a 24-hour clock 0..23.

DateTime moonLanding = DateTime.parse("1969-07-20 20:18:00");
assert(moonLanding.hour == 20);

Source

external int get hour;

© 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dartlang.org/stable/1.24.3/dart-core/DateTime/hour.html