Days in Month Calculator
Use this month calculator to check the number of days in any calendar month. It also shows the first and last weekday of the month, which is useful for work planning, payroll cutoffs, billing periods, subscriptions and administrative tasks.
Frequently Asked Questions
February has 29 days in leap years, which happen under the standard leap year rule used by the Gregorian calendar.
Yes. It is useful when you need to know the exact month length for payroll cutoffs, rent periods, subscriptions or invoice dates.
How this calculator works
Formula explanation
**Method:** Take the selected month, then get the last calendar day by moving to day 0 of the following month.
Worked example
**Example:** February 2028 has 29 days because 2028 is a leap year. March 2026 has 31 days.
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