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Date & Time Tools

Convert time zones, calculate ages and date differences, and convert Unix timestamps.

Unix Timestamp ConverterConvert Unix epoch timestamps (seconds or milliseconds) to human-readable dates in UTC and your time zone, and dates back to timestamps. Time Zone ConverterConvert a time between any time zones and cities, with daylight saving handled automatically. Compare several zones at once. Age CalculatorCalculate exact age from date of birth in years, months and days, plus total weeks, days and your next birthday countdown. Date Difference CalculatorCount the days, weeks, months and years between two dates. Optionally count business days only and include the end date. Nepali Date ConverterConvert Nepali Bikram Sambat (BS) dates to English (AD) dates and back. See today's Nepali date and calculate age in BS. Free and instant.

Date and time calculators

Work out time differences across the world, count the days between dates, calculate an exact age and convert Unix timestamps. These calculators use your browser’s built-in time zone database, which is kept up to date with daylight saving rules for every country, so results are correct for past and future dates.

What you can do here

  • Schedule calls and meetings across cities with the Time Zone Converter, which highlights business hours for each location.
  • Count days, weeks, months and business days for deadlines, notice periods and countdowns with the Date Difference Calculator.
  • Find an exact age in years, months and days, or check eligibility on a cut-off date, with the Age Calculator.
  • Translate epoch timestamps from logs and databases into readable dates with the Unix Timestamp Converter.

Why dates are tricky

Months have different lengths, leap years add a day every four years (with exceptions), and daylight saving time moves clocks on different dates in different countries. Doing these calculations by hand is error-prone; these tools handle the edge cases for you.