dart:core

isAfter method

bool isAfter(DateTime other)

Returns true if this occurs after other.

The comparison is independent of whether the time is in UTC or in the local time zone.

DateTime berlinWallFell = new DateTime(1989, 11, 9);
DateTime moonLanding    = DateTime.parse("1969-07-20 20:18:00");

assert(berlinWallFell.isAfter(moonLanding) == true);

Source

bool isAfter(DateTime other) {
  return _value > other._value;
}