Date & Time Tools

What the date and time tools do

Five pages share this hub. Time Zone Converter reads a wall-clock time in one IANA zone and shows it in another, using your browser’s time-zone data, including daylight saving where that zone has it. Unix Timestamp converts epoch seconds and ISO-8601 UTC strings. Countdown Timer ticks toward a local date while the tab is open. Week Number returns the ISO week (Monday start; week 1 contains the first Thursday). Days Until counts whole calendar days between two dates.

The countdown can pause if the browser throttles a background tab. Unix values here are seconds, not milliseconds. ISO week-year is not always the calendar year for dates in the first or last days of January and December.

How to use it

1. Choose the page: a zone conversion, an epoch value, a live countdown, an ISO week, or a day count.
2. Enter a date or time. For zones, pick IANA names such as Asia/Kolkata rather than a fixed “IST” offset.
3. Read the result. For a countdown, leave the tab open if you want it to keep ticking.
4. For a deadline that must be exact, confirm the zone on the invitation. This site does not send reminders.

Zone names and dates are processed in the browser with Intl. These tools do not upload them.