Calendar Excel 2025 Month Sun. January february march april s m t w f may june july august september october november december jan 01 new year's day jan 20 m. Choose almost any year and month.

The date function accepts three arguments: There are 7 months with 31 days, 4 months with 30 days, and 1 month with 28 days in 2025, or 52 weeks and 1 day in 2025 when counting by weeks.