Date & Time Tools
Work with dates, times, and timezones with ease. Calculate, convert, and format date & time instantly.
All Date & Time Tools (18)
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 countdown timer to any future date or event.
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 custom formatting and step.
Generate RangeDays Between Dates
Count the total number of days between any two dates.
Count DaysNext Birthday Countdown
Live countdown to your next birthday — days, hours, minutes, seconds remaining.
Use ToolSleep Cycle Calculator
Calculate the best time to wake up — based on 90-minute REM sleep cycles.
Use ToolStopwatch
Precision millisecond stopwatch with lap times, copy/export, and persistent state.
Use ToolTime Format Converter
Convert between 12-hour and 24-hour time formats. Handles AM/PM and military time.
Use ToolTime Zone Info
Get detailed information about any timezone — offset, DST, current time.
View Timezone InfoWorld Clock
Check the current time in cities around the world, side by side.
Check World ClockSuggest a Tool
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