Calculators
Time and date tools — all work offline.
Timezone Converter
Convert any time between two timezones. Shareable link.
Date Difference
How many days, weeks, months, or years between two dates?
Add / Subtract Days
Find a date by adding or subtracting days, weeks, months, or years.
Day of Week
Find the weekday, ISO week number, and date info for any date.
Countdown Timer
Count down to any event. Updates live every second. Shareable link.
Unix Timestamp
Convert between Unix epoch seconds and human-readable dates. Auto-detects milliseconds.
Leap Year Table
All leap years from 2000 to 2096 — plus a quick checker for any year.