getDaysInMonth method Null safety
Returns the number of days in a month, according to the proleptic Gregorian calendar.
This applies the leap year logic introduced by the Gregorian reforms of
- It will not give valid results for dates prior to that time.
Implementation
static int getDaysInMonth(int year, int month) {
if (month == DateTime.february) {
final bool isLeapYear = (year % 4 == 0) && (year % 100 != 0) || (year % 400 == 0);
return isLeapYear ? 29 : 28;
}
const List<int> daysInMonth = <int>[31, -1, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
return daysInMonth[month - 1];
}