How to use it
- Type or paste a date, or press Use the current time. A short line under the result says how it was read.
- If your date has slashes and is ambiguous, say whether the month or the day comes first.
- Choose what to do with times that have no time zone, and in which zone to show the result.
- Copy the format you need with its button.
The formats
- ISO 8601 is the international standard, such as 2026-11-03T12:00:00Z. The week date writes 3 November 2026 as 2026-W45-2: the ISO week 45, weekday 2 (Tuesday). The ordinal date is the year and day of the year, 2026-307.
- RFC 2822 is the date form of email headers, such as Tue, 03 Nov 2026 12:00:00 +0000. The HTTP date has the same shape but is always in GMT.
- US and European forms differ in the order of month and day, and in 12 or 24-hour time.
- Long form is written by your browser in the page language.
- Unix time counts seconds (or milliseconds) since 1 January 1970 00:00 UTC.
Worked example
The input 2026-11-03T12:00:00Z is Tuesday, 3 November 2026 at noon UTC. Its Unix time is 1,793,707,200 seconds. In US style it is 11/03/2026 12:00:00 PM and in European style 03/11/2026 12:00:00.
Good to know
- Dates with month names are read by your browser’s own parser, so unusual wordings may work in one browser and not in another. ISO 8601 always works.
- Years from 1000 to 9999 are supported, in the proleptic Gregorian calendar.