Returns true if other is a DateTime at the same moment and in the
same time zone (UTC or local).
DateTime dDayUtc = new DateTime.utc(1944, DateTime.JUNE, 6);
DateTime dDayLocal = new DateTime(1944, DateTime.JUNE, 6);
assert(dDayUtc.isAtSameMomentAs(dDayLocal) == false);
See isAtSameMomentAs for a comparison that adjusts for time zone.
Source
bool operator ==(other) {
if (!(other is DateTime)) return false;
return (_value == other._value && isUtc == other.isUtc);
}