Timestamp Converter
Converts second and millisecond timestamps to dates and back, showing UTC and your local time together.
Date & Time
These time tools share the browser built-in IANA time zone data — no network calls, no bundled zone tables. Convert a wall time from one zone to another (DST handled by the runtime), watch 14 cities at once, measure the gap between two dates, and convert between second or millisecond timestamps and date strings. Behaviour at a daylight-saving transition follows the browser Intl implementation.
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Date Difference
Counts days, weeks, months and years between two dates, with an option to include both endpoints.
Time Zone Converter
Converts wall time using IANA zone names: it derives the source offset at that instant and iterates to land on the target zone, with daylight saving coming from the browser Intl data rather than a hardcoded offset table.
World Clock
Lists the local date, time and UTC offset for 14 cities, refreshing every second. Zones are IANA identifiers and offsets come from the browser Intl data, so a city shifts automatically between its summer and winter offsets.
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