add static method

DateTime add({ required DateTime date, required DateDuration duration, })

add method

Implementation

static DateTime add(
    {required DateTime date, required DateDuration duration}) {
  int years = date.year + duration.years;
  years += ((date.month + duration.months) ~/ DateTime.monthsPerYear);
  int months = ((date.month + duration.months) % DateTime.monthsPerYear);

  int days = date.day + duration.days - 1;

  return DateTime(years, months, 1).add(Duration(days: days));
}