Свойство month

int month

Месяц [1..12].

final moonLanding = DateTime.parse('1969-07-20 20:18:04Z');
print(moonLanding.month); // 7
assert(moonLanding.month == DateTime.july);

Реализация

external int get month;

© 2012 the Dart project authors
Licensed under the BSD 3-Clause "New" or "Revised" License.
https://api.dart.dev/stable/2.18.5/dart-core/DateTime/month.html