Date and time tools
Date maths, clocks and calendars. Count with Days between dates, Add days to a date, Working days calculator and Age calculator; convert with Time zone converter, Unix timestamp converter, Hijri date converter, Hebrew calendar converter and Julian date converter. Sky and weather tools include Sunrise and sunset, Moon phase, Golden hour calculator and Dew point calculator; timers include Online timer, Online stopwatch, Pomodoro timer and Tabata timer.
- Days between datesDays between two dates, as weeks, months or years, with business days.
- Age differenceThe exact age gap between two people from their birth dates.
- Half birthdayThe date six months after a birthday, with days left and the next five.
- PTO accrualProject paid time off hours from the accrual rate per pay period.
- Pay periodsEvery pay date in a year for weekly, biweekly, semi-monthly or monthly pay.
- Working days calculatorBusiness days between two dates, without weekends and the days off you list.
- Notice periodThe last day of a notice period in calendar days, working days, weeks or months.
- Add days to a dateA date plus or minus days, weeks, months or years, with the day of the week.
- Day of the weekThe weekday of any date from year 1 to 9999, with its ISO weekday number.
- Day of the yearThe day number of a date, days left in the year, or the date of day N.
- Days in monthDays, weeks and weekdays in any month and year, leap years included.
- Leap year checkerIs a year a leap year? The rule that decides it, plus the next and previous leap years.
- Countdown to a dateDays, hours, minutes and seconds left until a date you choose, with a share link.
- Military time converterConvert 12-hour time to 24-hour military time and back, with the spoken reading.
- Hours workedA weekly timesheet that totals work hours from start, end and break times.
- Anniversary calculatorHow long since a date, when the next anniversaries fall, and milestone days such as 1000 days.
- ISO 8601 duration parserBreak a duration like P3Y6M4DT12H30M5S into parts and total seconds, or write seconds as a duration.
- Online stopwatchA stopwatch with hundredths of a second, lap times and keyboard control.
- Pomodoro timerA focus timer with 25-minute sessions, short and long breaks, sound and notifications.
- Online alarm clockSet an alarm time in your browser, with a beep and snooze. Keep the tab open.
- Excel date converterTurn Excel and Google Sheets serial numbers into dates and times, and dates back into serial numbers.
- World clockLive clocks for the cities and time zones you choose, with offsets and day or night.
- FILETIME converterWindows FILETIME, .NET ticks and Chrome WebKit timestamps converted to a UTC date, and a date to all of them.
- Time zone converterThe same moment in another time zone, with daylight saving time taken into account.
- Daylight saving datesDates and times of clock changes for a time zone and year, from your browser's time zone data.
- Shift scheduleA printable calendar of working and off days for a repeating shift pattern.
- Ethiopian calendar converterConvert Gregorian dates to Ethiopian calendar dates and back, with month names and the new year date.
- Hijri date converterGregorian to Hijri and Hijri to Gregorian dates on the Umm al-Qura calendar, with the weekday.
- Unix timestamp converterEpoch seconds or milliseconds to a readable date and back, with ISO 8601.
- Zodiac signYour Western (tropical) zodiac sign from a birth date, with date range, element and modality.
- Chinese zodiacChinese zodiac animal, element and yin-yang from a birth date, with a note for early-year births.
- Mayan calendar converterGregorian dates to the Mayan Long Count, Tzolk'in and Haab' dates, and a Long Count back to a date.
- Chinese lunar converterConvert Gregorian dates to Chinese lunar dates and back, with leap months and the year's animal and element.
- Equinox and solstice calculatorThe moments of the equinoxes and solstices for a year, in any time zone, with the length of each season.
- Hebrew calendar converterConvert Gregorian dates to Hebrew calendar dates and back, with month names and a leap-year check.
- Persian calendar converterConvert Gregorian dates to Persian (Solar Hijri) dates and back, with the Persian month names.
- Date format converterConvert a date between ISO 8601, RFC 2822, US, European and Unix formats.
- Japanese era converterConvert Gregorian dates to Japanese era years and back, with exact start and end dates in changeover years.
- Korean age calculatorYour traditional Korean age, year age and international age from a birth date, with the next 1 January.
- Days until a holidayPick a holiday to see the days left, its date and weekday, including movable ones such as Easter and Thanksgiving.
- Life in weeks calculatorA chart of your life as weeks: boxes filled for weeks lived, with weeks left and the percentage used.
- Tabata timerAn interval timer for Tabata and HIIT: work, rest and rounds you set, a beep at each change.
- Clock angle calculatorThe angle between the hour and minute hands of a clock at any time, with the hand positions.
- Easter dateEaster Sunday for any year, Western or Orthodox, with Lent, Good Friday, Ascension and Pentecost dates.
- Egg timerHow long to boil an egg for the doneness you like, adjusted for size and starting temperature, with a countdown.
- Milestone date finderDates of the 100th, 500th, 1,000th and 10,000th day after a start date, and the day count so far.
- Week numberThe week number of a date and the days of a numbered week, ISO 8601 or US style.
- Golden hour calculatorMorning and evening golden hour and blue hour for any date and place, with sunrise and sunset.
- Moon phaseMoon phase, illumination and age for any date, with the next full and new moon.
- Schengen days calculatorDays used and left in the rolling 180-day window of the Schengen short-stay rule.
- Time calculatorAdd or subtract hours and minutes, or the duration between two clock times.
- Coordinate distance calculatorGreat-circle distance, bearing and midpoint between two latitude and longitude points.
- Jet lag calculatorTime difference between two places and a day-by-day sleep schedule shifting about 1 hour a day.
- Packing list generatorA packing checklist by trip type, length and climate, with your own items added.
- Calendar generatorA printable calendar for any year or month, with Monday or Sunday start and week numbers.
- Sunrise and sunsetSunrise, sunset, solar noon, day length and civil twilight for any place and date.
- Travel budget calculatorTotal trip cost from daily spending and fixed costs, per day and per person.
- Feels like temperatureWind chill when it is cold and windy, heat index when it is hot and humid.
- Dew point calculatorDew point, relative and absolute humidity from air temperature, with the Magnus formula.
- Beaufort wind scaleWind speed to Beaufort force 0 to 12, with land and sea descriptions.
- Layover calculatorAdds up the time a connection needs and shows how much spare time you have.
- Julian date converterCalendar date and time to Julian Day, JDN, MJD and YYDDD, and back again.
- Age calculatorExact age in years, months and days, totals and days to the next birthday.
- Date range generatorList the dates between two dates by day, week, month or year, with weekday filters.
- Decimal hours converterTurn 7:45 into 7.75 hours and 7.75 back into 7:45, with minutes and h:mm:ss.
- Fiscal quarter calculatorFiscal quarter, fiscal year and quarter dates for any date and any fiscal year start month.
- Meeting time plannerFind the overlap of working hours across time zones and see it in each local time.
- Nth weekday of monthThe date of the 3rd Thursday, last Friday or any nth weekday for 12 months in a row.
- Seconds to h:mm:ssConvert seconds to days, hours, minutes and seconds, or a duration back to seconds.
- Online timerCountdown with a sound alarm and one-click presets from 1 to 90 minutes.