Returns the number of days in the month of the given date.
The date object to check.
Number of days in that month.
getDaysInMonth(new Date(2025, 1, 1)); // 28 or 29 depending on year Copy
getDaysInMonth(new Date(2025, 1, 1)); // 28 or 29 depending on year
Returns the number of days in the month of the given date.