Days in Month
Find out how many days are in any month of any year, including leap-year February. Free and private, right in your browser.
Pick a month and year and instantly see how many days it has, no mental math or calendar squinting required, handy for figuring out February in a leap year or nailing down billing and deadline calculations.
How to use it
- Select the month
- Enter the year
- Read the number of days shown
Frequently asked questions
- Does this account for leap years?
- Yes. Enter a year and it correctly gives February 29 days for leap years and 28 for non-leap years, using the standard leap year rule (divisible by 4, except centuries not divisible by 400).
- Can I check a month in a past or future year, like 2000 or 2100?
- Yes, any year works. 2000 was a leap year (February had 29 days) but 2100 will not be, since it's a century year not divisible by 400.
- Why would I need this instead of just checking a calendar?
- It's faster when you're calculating things like billing cycles, loan interest, project deadlines, or age in days, especially for February or year-boundary dates where the day count isn't obvious.
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Nothing is uploaded
The file never leaves your device. There is no server to send it to, so there is nothing to leak, log, or subpoena.
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No signup, no limits
No account, no email, no daily cap, no watermark, and no paid tier waiting behind the third file.
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Works offline
Load the page once and it keeps working with the network off, because all the work was always happening locally.