Date & Time
Calendar questions that need more than a simple count: working days with each country's public holidays, exact age, time sheets and meeting planning across time zones.
All tools
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Age Calculator
Enter a birth date and see your exact age in years, months and days, the days and hours you have lived, your next birthday and the milestones of your life.
Business Days Calculator
Count working days between two dates or add them to a date. Weekends and public holidays of your country are skipped. Also gives calendar days.
Day Length, Sunrise and Sunset Calculator
Sunrise, sunset and hours of daylight for any date and place, in the place's own time zone, with the next seven days in a table you can download.
Day of the Week Calculator
Find the weekday of any date, its ISO week number and day of the year, the days from today, and the weekday of the same date in each of the next ten years.
Daylight Saving Time Dates by Time Zone
Daylight saving start and end dates, clock times and UTC offsets for any time zone and year, read from the time zone data of your browser.
Fiscal Quarter and Fiscal Year Calculator
Fiscal year and quarter for any date, with the first and last day of each quarter, for a fiscal year that starts in any month, named both ways.
Hebrew Calendar Converter
Convert a Gregorian date to a Hebrew date and back, with the molad, the leap years of the 19-year cycle, the year length and the months of the year.
Hijri Calendar Converter
Convert a Gregorian date to a Hijri date and back, in the Umm al-Qura or the civil calendar, and see the weekday and every day of that Hijri month.
Julian Day Calculator
Convert a Gregorian or Julian calendar date and UT time to the Julian Day Number, Julian Date and Modified Julian Date, and back. The 1582 gap is explained.
Julian to Gregorian Converter
Convert a date between the Julian and Gregorian calendars for any year. See the difference in days for each period and the years countries changed.
Maya Calendar Converter
Convert a date to its Maya Long Count and Tzolk'in and Haab day names, or a Long Count back to a date, using the GMT correlation the sources use.
Meeting Time Planner
Find a meeting time across two to six time zones. A 24-hour grid shows each place's working hours and night, with daylight saving. Calculated in your browser.
Nth Weekday of a Month Calculator
The date of the first, second, third, fourth, fifth or last Monday, Tuesday or other weekday of any month, with every date of that weekday in the month listed.
Persian Calendar Converter
Convert a Gregorian date to a Solar Hijri (Persian) date and back, with Nowruz, the weekday and the twelve months of the year. Used in Iran and Afghanistan.
Printable Calendar
Print or save a calendar for a year or one month, Monday or Sunday start, with week numbers and public holidays for twelve countries.
Public Holidays and Bridge Days
See the public holidays of 2025, 2026 or 2027 for your country, and the bridge days that join a holiday to the weekend into one longer break.
Schengen 90/180 Day Calculator
Enter your trips to the Schengen Area and see the days left on any date, the latest exit for a planned entry, and when the full 90 days come back.
Week Number Calculator
List every week of a year from 1900 to 2100 with ISO 8601 or US numbering, with the first and last day of each week, the week count and the week of any date.
Work Hours Calculator
Write one line per shift and get the total hours, the overtime above your weekly limit and the estimated pay with an overtime rate. Runs in your browser.
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Public holidays come from official calendars and are checked every year.