Time Tools

Time, dates and time zones — calculated precisely.

Tools found: 14

Time & Dates

Time Calculator

Add or subtract hours, minutes and seconds, with optional date and time zone.

Time & Dates

Count days between dates or add calendar days, weeks, months and years.

World Time

Convert a date and time between cities, including clock changes.

Work & Planning

Count down to an event and save or share the exact target.

Work & Planning

Calculate working dates with custom weekdays and public holidays.

Work & Planning

Find shared working periods for two to six cities.

Time & Dates

Calculate elapsed time between two dates, with independent time zones.

Time & Dates

Convert fixed-duration units from milliseconds to fortnights.

Time & Dates

Calculate exact age, birthdays and milestone dates.

Time & Dates

Find the weekday, day of year and ISO week for any Gregorian date.

World Time

Explore actual clock changes and compare time differences across a year.

World Time

Create an event everyone can read in their own local time.

Science & History

Estimate sunrise, sunset, daylight and twilight for a city and date.

Science & History

Convert Julian and Gregorian dates, with correct leap years and weekdays.