Days in a Month
How many days in any month, with leap-year handling for February. Plan billing cycles and rotations.
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How many days in any month, with leap-year handling for February. Plan billing cycles and rotations.
How to use Days in a Month
- Open the toolNo signup and nothing to install; it works as soon as the page loads.
- Set “Month”
- Set “Year”
- Read the resultChange any input and the result is recalculated immediately.
Worked example with the defaults
- FEBRUARY · February 2026
- 28 days
Nothing you enter leaves your device
All of the work happens inside your browser. Whatever you type is never packaged up and sent to a server, and no request this page makes carries it.
That makes it safe for contract amounts, personal details and internal documents you would rather not hand to a third party — close the tab and it is gone.
What this tool does not do
Days in a Month only does what a browser can do on its own — it talks to no backend service. So it keeps no history for you and syncs nothing across devices; if you need a record, copy or download the result.
It is also not a substitute for professional judgement. For legal, medical or tax decisions, treat the output as a starting point rather than a final answer.
Frequently Asked Questions
- Why does February change?
- Earth takes about 365.25 days to orbit. The extra quarter-day is rounded up every four years, except in century years not divisible by 400.