Date & Time Tools

Dates and clocks look simple until months have different lengths, leap years appear, or two people sit in time zones that change clocks on different days. The tools on this page take that arithmetic off your hands. The age calculator works out an exact age or the gap between any two dates in years, months, days and total days. The time zone converter converts a date and time between IANA time zones, applying the correct daylight saving rules for that date, and shows UTC offsets, abbreviations and whether the result falls on a different day. Both run in your browser using your own inputs, so there is nothing to sign up for and no information is sent to a server. They suit planning meetings, checking eligibility dates and counting days to a deadline.