📅 Date & Time
Date & Time Calculators
Date differences, age from DOB, and add or subtract days.
12 tools in this category
Showing 12 of 12
- Date DifferenceFind the number of days between two dates.
- Add / Subtract DaysAdd or subtract a number of days from a starting date.
- Age from Date of BirthDetailed age breakdown from DOB — same engine as the math age tool.
- Business Days CalculatorCount weekdays (Mon–Fri) between two dates, excluding weekends.
- Unix Timestamp ConverterConvert between Unix epoch seconds and a human-readable date.
- Add Hours & MinutesAdd a duration of hours and minutes to a starting clock time (24h).
- ISO Week NumberFind the ISO-8601 week number for a given date.
- Business Days Between DatesCount weekdays (Mon–Fri) between two dates inclusive.
- Payday CalendarGenerate upcoming payday dates from a start date and frequency.
- Zodiac Sign CalculatorFind the Western sun-sign zodiac for a birth month and day (for fun).
- Days Until DateHow many days until (or since) a target date.
- Hours Between Date-TimesTotal hours between two date-time values (ISO-style).