Date & Time tools

Ages, durations, date arithmetic and timestamp conversion across formats and time zones.

• Age Calculator - Calculate exact age from a date of birth in years, months and days, plus total weeks, days and hours lived and the countdown to the next birthday.
• Date Difference Calculator - Count the days, weeks, months and years between two dates, with an option to count business days only and to add or subtract days from a date.
• Unix Timestamp Converter - Convert a Unix timestamp to a human-readable date and back. Handles seconds and milliseconds, UTC and local time, and ISO 8601 output.
• Time Zone Converter - Convert a time between any number of time zones at once and find the hours that work for everyone, with daylight saving handled automatically.