Date Converter — Formats, Calendars & Timezones
Convert dates across formats, world calendars and timezones
How it works
Enter a date in almost any form — ISO, a locale string, or a Unix timestamp — and it's rendered every way at once. Standard formats include ISO 8601 (UTC and local), RFC 2822, Unix seconds/milliseconds, US/European locale, day of week, day of year, ISO week, quarter, leap year, Julian Date and more. The date is also converted into a dozen calendar systems — Gregorian, Hijri (Umm al-Qura and Civil), Persian (Solar Hijri), Hebrew, Indian National, Buddhist, Japanese imperial era, Chinese, Coptic, Ethiopic and Minguo — and shown across 400+ timezones with offsets. Leave the field empty to watch the current time live.
Frequently asked
Can it convert Gregorian dates to Hijri (Islamic)?
Yes. Every date is shown in the Hijri calendar in both the Umm al-Qura (Saudi official) and tabular Civil variants, alongside the Persian, Hebrew and other calendars — using your browser's Intl calendar support.
Which calendar systems are supported?
Gregorian, Islamic/Hijri (Umm al-Qura and Civil), Persian (Solar Hijri), Hebrew, Indian National (Śaka), Buddhist (Thai), Japanese imperial era, Chinese lunisolar, Coptic, Ethiopic and Minguo (ROC).
What date formats can I paste?
Anything the browser can parse, including ISO 8601 (2026-06-23T00:00:00Z), locale date strings, and Unix timestamps in seconds or milliseconds.
Does it handle timezones?
Yes — pick from over 400 timezones to see the date there with its UTC offset, plus a built-in list of major world cities.