Date Info

Date Info is a free time & date tool that runs entirely in your browser — week no, day of year, quarter, leap. No upload, no account, no limits.

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How to use Date Info

Open the Date Info tool.
Paste or type your date or timestamp into the input field.
The output updates as you type — adjust the options if you need a different format.
Copy the result, or share the URL to hand the exact input to someone else.

About Date Info

Get detailed information about any date: weekday, day of the year, ISO week number, quarter, days in the month, whether it's a leap year, whether it falls on a weekend, and its Unix timestamp.

What people use it for

Find the ISO week number for a date.
Check the day-of-year or quarter for reporting.
Determine whether a year is a leap year.

Frequently asked questions

What facts are shown?

Weekday, day of year, ISO week, quarter, days in month, leap year, weekend flag and Unix time.

Is it private?

Every calculation happens on this page, in your own browser. Your input is never sent to a server, never logged and never used for training — which also means the tool keeps working when you are offline.