Date & Time Tools
Work with dates, times, and timezones with ease. Calculate, convert, and format date & time instantly.
All Date & Time Tools (17)
Explore our collection of free date & time tools
Date Calculator
✦ FeaturedAdd or subtract years/months/weeks/days from any date — leap-year aware, weekday output, instant. 100% client-side.
Calculate DateAge Calculator
Calculate your exact age in years, months, and days from any birth date — plus next birthday countdown.
Calculate My AgeBusiness Days Calculator
Calculate working days between two dates, excluding weekends and holidays.
Calculate Business DaysCountdown Timer
Create a live countdown timer to any future date or event, with a shareable link.
Start CountdownDate Calculator
Add or subtract years/months/weeks/days from any date — leap-year aware, weekday output, instant. 100% client-side.
Calculate DateDate Difference
Find the exact difference between two dates in days, weeks, months, and years.
Find DifferenceEpoch Converter
Convert Unix timestamps to human-readable dates and back.
Convert EpochTime Duration Calculator
Calculate the duration between two times in hours, minutes, and seconds.
Calculate DurationTimezone Converter
Convert time between any two timezones worldwide, instantly.
Convert TimezoneWeek Number Finder
Find the ISO week number for any date, and see the full week's date range.
Find Week NumberAge in Days/Hours
See your age expressed in days, hours, minutes, and seconds — plus a calendar breakdown. Updates live every second.
Calculate Age in DaysDate Range Generator
Generate a list of dates between two dates with a custom step and date format — copy as text or export to CSV.
Generate RangeDays Between Dates
Count the exact number of days between any two dates, with a weekday, weekend, and business-day breakdown.
Count DaysNext Birthday Countdown
Count down to your next birthday — see exactly how many days, weeks, and months remain, the age you'll turn, and the weekday it falls on, instantly and in-browser.
Start CountdownStopwatch
Millisecond precision stopwatch with lap splits, fastest/slowest highlighting, and one-click copy of results.
Start StopwatchTime Format Converter
Convert 12-hour AM/PM ↔ 24-hour, duration strings ↔ seconds, and HH:MM:SS ↔ seconds — with a full reference chart.
Convert TimeTime Zone Info
Look up any IANA time zone — its current local time, UTC offset, abbreviation, and whether daylight saving time is in effect right now.
Look Up Time ZoneWorld Clock
See the current time in up to 12 cities side by side on one live board, with UTC offsets, time-zone abbreviations and next-day markers. Free, private, no sign-up.
Check World ClockSuggest a Tool
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