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Time and Date

Convert zones and compare calendar dates.

Browse Time and Date

Time-Zone ConverterConvert a local date and time between IANA time zones with DST support.Time CalculatorAdd or subtract a duration from a clock time and track previous or following days.Date CalculatorAdd or subtract whole calendar days from a date with leap-year support.Age CalculatorCalculate exact age in calendar years, months, and days for any comparison date.Date Difference CalculatorCount signed calendar days between two dates.

Start here: practical tutorial

Compare dates and times without losing time-zone context

Choose the exact date or time task, enter a real calendar date, confirm both IANA zone labels, and review the converted date as well as the clock time.

  1. Choose the tool matching the input you have and the result you need.
  2. Confirm every unit, option and assumption before running it.
  3. Review the example, limitations and output before using the result.

Worked example

Dublin and New York can change daylight-saving clocks on different weekends, so a meeting conversion needs its date.

What this does not replace

Confirm critical travel, legal, broadcast or market schedules with the responsible organisation.

Convert a meeting time