Convert a date between the Gregorian, Islamic, Hebrew, Persian, Chinese, Indian, Ethiopian, Coptic, Buddhist and Japanese calendars. Runs on your device.
To convert a date, pick the calendar it is written in, type the year, month and day, and the page shows the same day in ten other calendars at once. The page opens with today's date, so you also see what today is in the Hijri, Hebrew, Persian and Chinese calendars straight away. For example, 30 March 2025 is 1 Shawwal 1446 in the Umm al-Qura Hijri calendar, 1 Nisan 5785 in the Hebrew calendar, 10 Farvardin 1404 in the Persian calendar and 2568 in the Buddhist era. Press Today to return to the current date. Nothing you type is stored or sent anywhere.
The date maths is done by your browser, using the calendar data that ships with it through the standard Intl API (the CLDR and ICU libraries). This page adds no calendar rules of its own. Going from another calendar to Gregorian, the page tries each day over a three year window, asking the browser what that day is in the chosen calendar, until one matches your year, month and day. If none matches, the date does not exist, such as day 30 of a 29-day month. Supported Gregorian years are 1000 to 2999, and the search is capped at 1200 days.
The Islamic calendar is lunar, and there is more than one way to fix its months. The Umm al-Qura calendar, used in Saudi Arabia, follows astronomical rules. The civil or tabular calendar follows a fixed arithmetic pattern of 354 or 355 days per year. They often agree and sometimes differ by one day, so both are listed. Neither is the same as a moon sighting, which can move the start of a month by a further day or two, so a date for Ramadan or Eid should be confirmed locally. The same caution applies to the Chinese calendar, where the leap month needs the box ticked.
Most calendars take a month number from 1, counting as your browser does. Hebrew months are chosen by name, from Tishri to Elul, with Adar I and Adar II in leap years. The Japanese calendar needs an era (Reiwa, Heisei, Showa, Taisho or Meiji) and the year inside it, so Reiwa 1 began on 1 May 2019. Eras before Meiji (which began in January 1868) are shown in the table but cannot be converted back, and the page says so. If your browser does not include one of the calendars, its row reads "Not supported in this browser" instead of showing a wrong date. The Chinese year shown is the Gregorian year in which that lunar year begins, with its animal, for example the year of the Dragon in 2024. The Chinese new year in 2024 was on 10 February. Dates before 1000 or after 2999 are not supported.
Leave Convert from on Gregorian, type the year, month and day, and read the Islamic rows. 30 March 2025 shows as 1 Shawwal 1446 in Umm al-Qura and as 30 Ramadan 1446 in the civil calendar, so the two can differ by one day.
Umm al-Qura is the Saudi astronomical calendar and the civil calendar is a fixed 30-year arithmetic cycle. Both are shown because they give different answers about one day in several. For religious dates such as Eid, confirm with a local moon sighting or authority.
Open the page: it starts on today's date and the Hebrew row shows the day, month name and year. On 30 March 2025 it reads 1 Nisan 5785. The Hebrew year begins in Tishri, the autumn, so its year number rises then, not in January.
The Persian (Solar Hijri) year begins at Nowruz around 20 or 21 March. 1 Farvardin 1404 fell on 21 March 2025, so a date before that day is still in year 1403. Add about 621 or 622 to a Persian year to get the Gregorian year.
The row gives the lunar month and day, then the year as the Gregorian year it starts in, plus its animal. Chinese New Year 2024 was 10 February 2024, the year of the Dragon, and 2025 started on 29 January, the Snake. Dates in January before it still belong to the earlier animal.
The day is outside that month. Lunar months have 29 or 30 days, the Persian calendar has 12 months with the last holding 29 or 30, and the Coptic and Ethiopian calendars have a 13th month of only 5 or 6 days. Lower the day or check the month number.