Make time make sense
Dates and calendars
Count days, find dates and make calendars.
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- Age calculatorFind your age in years, months and days, plus the date of your next birthday.
- Business days calculatorCount working days between dates, or find a date by adding business days.
- Calendar generatorMake a printable monthly or yearly calendar with a Sunday or Monday start.
- Date calculatorAdd or subtract calendar days, weeks, months or years from a date.
- Date difference calculatorCount the days and weeks between two dates, with an optional inclusive count.
- Day of the week calculatorFind the weekday for a date, along with its day-of-year and ISO week.
- Day of the year calculatorFind the day number of a date, or convert a year and day number back to a date.
- Julian date converterConvert between a Gregorian date, Julian date (JD) and modified Julian date (MJD).
- Leap year calculatorCheck whether a year is a leap year and see the next leap year.
- Random date generatorPick random dates inside an inclusive date range, with optional unique results.
- Week number calculatorFind a date’s ISO week number, or turn an ISO week into its Monday-to-Sunday range.
