Date & Time Tools
Free online date and time tools: age calculator, days between dates, add or subtract days from a date and time zone converter.
Work out exact ages, count the days between two dates, add or subtract days, months or years from a date, and convert times between time zones with daylight saving handled for you.
All calculations happen in your browser using standard calendar rules.
Age Calculator
Date & Time Tools
Calculate exact age in years, months, and days from a date of birth, as…
Date Add/Subtract Calculator
Date & Time Tools
Add or subtract days, months, or years from a date — instantly, in your…
Date Difference Calculator
Date & Time Tools
Calculate the number of days (and weeks) between two dates — instantly, in your…
Time Zone Converter
Date & Time Tools
Convert a date and time from one time zone to another, using your browser's…
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Frequently asked questions
Does the time zone converter handle daylight saving?
Yes, it uses your browser's built-in time zone database.
Are business days counted?
The date tools count calendar days, not business days.
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