How Many Days in a Month? — Full Table

How many days in each month: seven months have 31, four have 30, and February has 28 or 29. Pick any month and year above for the exact figure, including the leap year case, with the whole twelve-month table shown alongside.

Two ways to remember it

The rhyme — thirty days hath September, April, June and November — covers the short months. The knuckle method works the other way, with the raised knuckles marking the 31-day months and the dips between them the shorter ones. Both are walked through in the knuckle mnemonic.

February and the leap rule

A year is a leap year if it is divisible by four, except centuries, which must be divisible by 400. So 2000 was a leap year and 1900 was not. The reason for the exception is in February and leap years.

Guides about Days in a Month

Quick answers February and Leap Years: How Many Days in February and Why February has 28 days, or 29 in a leap year. Here is the complete leap rule including the century exception, why the month is short, and how leap day birthdays work. 6 min read Quick answers How Many Days in Each Month: The Complete Reference The number of days in each month, set out in order, with February's two cases explained and three reliable ways to remember the whole pattern from memory. 5 min read Calendar notes The Knuckle Trick for Months: How the Hand Mnemonic Works How the knuckle trick for months works, in both the two-hand and one-hand versions, and how it compares with the thirty-days-hath-September rhyme. 6 min read

More months.now pages

This Month The current month with its number, day count, quarter, progress and a calendar grid. Next Month Next month's name, number, day count and calendar — useful for planning ahead. Month Numbers Which month is number 7? The full name-to-number reference, with where each name came from. Which Quarter The current calendar quarter, how far through it we are, and how fiscal years shift the answer.

Frequently asked questions

Which months have 31 days?

January, March, May, July, August, October and December — seven in total.

Which months have 30 days?

April, June, September and November. The rhyme covers exactly these four.

How many days does February have?

28 in a common year and 29 in a leap year. Enter the year above for the exact answer.

Why do the months have uneven lengths?

They are inherited from the Roman calendar, where adjustments and imperial renamings left the pattern we still use rather than anything systematic.