Time & Date Calculators
Date math, countdowns, days between and time tools.
Date Calculator – Add or Subtract Days, Weeks, Months, Years
Add or subtract days, weeks, months or years from any date and see the resulting date and weekday.
Open →Add or Subtract Days Calculator
Quickly add or subtract a number of days from a date to find the exact resulting date and weekday.
Open →Days Between Dates Calculator
Count the number of days, and full weeks, between two dates — with an option to include the end date.
Open →Countdown Timer – Days, Hours, Minutes to Any Date
Count down to any future date and time — see the days, hours, minutes and seconds remaining.
Open →Time Calculator – Duration & Add/Subtract Time
Find the duration between two times, or add and subtract hours and minutes from a time of day.
Open →Week Number Calculator – ISO-8601 Week
Find the ISO-8601 week number for any date, along with its ISO week-numbering year.
Open →World Clock – Live Time Across Cities
See the current local time, date and UTC offset for cities worldwide, updated live with correct daylight saving handling.
Open →Time Zone Converter
Convert a date and time from one city to another, with daylight saving resolved live from the IANA time zone database.
Open →Meeting Time Planner – Overlapping Working Hours
Find working-hour overlaps across cities to schedule calls — e.g. the best time to call the US or UK from India.
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