Date & Time

Date and time calculators count the gap between two moments or work out a date from another one. The date difference calculator counts the days, and the weeks and days, between two dates, and the time duration calculator measures the hours and minutes between two clock times.

For other everyday questions, the age calculator gives an exact age from a birth date, the day of the week calculator names the weekday for any date, and the hours calculator adds up time worked. The time calculator adds or subtracts hours and minutes, and the time zone calculator converts a time between UTC offsets.

Results follow the counting rules described on each page, such as whether the end date is included. Daylight saving changes and local time zone rules can shift a clock-time answer by an hour, so double-check results that cross a time change or a border before you book travel or set a deadline.