Dates and Times
Age, date difference, add or subtract days, business days with holidays, shift schedule, Japanese era and Hijri date converter.
Add or subtract days, business days, weeks, months or years from any date: find 90 days from today, due dates, deadlines and warranty end dates.
Age CalculatorCalculate your exact age in years, months and days, the next birthday, zodiac signs and Korean, Japanese and Chinese ages (만 나이, 数え年, 虚岁).
Business Days CalculatorCount business days between two dates or add working days to a deadline, with weekends, public holidays and decreed swaps for Brazil, the US and 66 more countries.
Date Difference CalculatorCount the days between two dates and see the result in weeks, months, years, hours and minutes, with the option to include the end date.
Hijri–Gregorian Date ConverterConvert Hijri and Gregorian dates with the Umm al-Qura or tabular calendar, see the month view, the expected Ramadan and Eid dates and your Hijri age.
Holiday CalendarSee public holidays of 68 countries in a monthly calendar, list every holiday of the year and count the days left until the next one, with regions.
Japanese Era ConverterConvert Gregorian years and dates to Japanese eras (Reiwa, Heisei, Showa, Taisho, Meiji) and back, with 干支, an age table and school years.
Shift Schedule GeneratorCreate a 2/2, 3/3, 24/72, 5/2 or custom shift calendar, compare monthly hours with the norm hours and export it to .ics or Excel.
The dates and times section gathers calculators for working with the calendar. The age calculator gives your exact age in years, months and days, including the East Asian counting systems; the date difference calculator measures the time between two dates; the add days calculator moves a date forward or back, optionally in business days; the business days calculator counts working days using the holidays of many countries; the shift schedule generator builds work rotations with calendar export; the Japanese era converter translates dates to and from era years and school years; and the Hijri converter changes dates between the Islamic and Gregorian calendars.
Holiday calendars, calendar systems and local counting rules differ between countries and are sometimes changed by official decree, so confirm important dates with the official source. All tools are free, run online and need no sign-up.