Codex of FaithsAn illustrated atlas of belief

Calendar converter

Pick a date and see it in the calendars of the world’s religions: Hebrew, Islamic, Persian, Indian, Chinese, Buddhist, Coptic, Ethiopian and Julian, with the festivals that follow.

  • Gregorian

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    The civil calendar of most of the world, introduced by Pope Gregory XIII in 1582. Western churches set Christmas and Easter by it. Christianity →

  • Julian (Old Style)

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    The calendar of the Roman Empire, still used for feasts by the Orthodox churches of Russia, Serbia, Georgia and Jerusalem. It now runs 13 days behind the Gregorian. Orthodox Easter →

  • Hebrew

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    Lunisolar: months follow the moon, and a leap month keeps the festivals in their seasons. Years count from the creation of the world (AM). The day begins at sunset. Judaism →

  • Islamic (Hijri)

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    Purely lunar and about eleven days shorter than the solar year; years count from the hijra of 622 (AH). Shown here in the Umm al-Qura reckoning of Saudi Arabia. Many communities begin each month by sighting the new moon, so dates can differ by a day. The day begins at sunset. Islam →

  • Solar Hijri (Persian)

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    The solar calendar of Iran and Afghanistan. Its year begins at Nowruz, the spring equinox, and counts from the hijra (AP). Nowruz →

  • Indian national (Śaka)

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    India’s official civil calendar, adopted in 1957. Hindu, Jain and Sikh festivals follow older lunisolar calendars, so their dates are worked out separately. Hinduism →

  • Chinese

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    Lunisolar, with years named in a cycle of sixty. Lunar New Year, Qingming and the Daoist feasts follow it. Browsers work it out by their own astronomical rules, so when a new moon falls close to midnight in China the day shown can be one off the official calendar: around Lunar New Year 2027, for example, it starts the year on 7 February instead of 6 February. Daoism →

  • Buddhist Era

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    Used in Thailand, it counts years from the Buddha’s final nirvana: 543 years before the Common Era in Thai reckoning. Buddhism →

  • Japanese era

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    Years counted by the reign of each emperor. The Reiwa era began on 1 May 2019. Shinto →

  • Coptic

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    The calendar of the Coptic Orthodox Church, descended from the ancient Egyptian one; its Era of the Martyrs counts from 284 CE. Ancient Egypt →

  • Ethiopian

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    Twelve months of thirty days and a short thirteenth. The Ethiopian Orthodox Church keeps Christmas, Genna, on 7 January. Christmas →