DateKit – Free Date & Time Tools

⚡ Instant • Free • No signup

Date & Time Tools that just work.

Minimal, fast tools for weekdays, date differences, workdays, countdowns, week numbers, leap years, timestamps and more. Designed for mobile first.

Search tools

Find the weekday for any date in history or the future.

Count the number of days between two dates (optionally inclusive).

Add or subtract N days from a starting date.

Count business days (Mon–Fri) between two dates.

Get age in years, months, days and total days.

Days left until a date + live countdown timer.

Find ISO week number for any date.

Check if a year is leap year (Gregorian rules).

Date ↔ Unix seconds/milliseconds, instantly.

Convert YYYY-MM-DD ↔ DD/MM/YYYY and validate input.

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