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Tools for focused date & time work.
17 tools. Use Control or Command K to search from any page.
Convert Unix seconds or milliseconds into readable dates, ISO 8601, UTC and browser-local time.
Generate Unix seconds and milliseconds from a chosen date, time and IANA timezone.
Convert an explicitly millisecond Unix timestamp into readable UTC and browser-local dates.
Normalize an offset-bearing ISO 8601 date/time and view its UTC and browser-local equivalents.
Convert a calendar date and clock time in an explicit IANA timezone to Unix seconds and milliseconds.
Convert a Unix timestamp with explicit units to a date/time in your chosen IANA timezone.
Convert a chosen date and time between two IANA timezones, including their UTC offsets.
Read a snapshot of your device’s current date, time and UTC offset in an IANA timezone.
Compare two explicit local dates and times as a calendar difference and elapsed days, hours, minutes and seconds.
Calculate the difference between two clock times, optionally anchored to a pair of local calendar dates.
Describe a target date/time relative to a chosen reference and inspect the exact elapsed difference.
Convert a calendar date between six explicit numeric formats without guessing its locale or timezone.
Convert a Unix epoch value in explicit seconds or milliseconds to readable UTC and browser-local dates.
Find a calendar date’s week number, week year and weekday using ISO 8601 or Sunday-start weeks.
Check whether a year is a Gregorian leap year and see the divisibility rule that explains the result.
Count business days inclusively between two dates using your weekend definition and optional holiday list.
Calculate calendar age in years, months and days, plus total days, on an explicitly chosen target date.