Calendars

The Bahá'í holy days on the Badí' calendar: Naw-Rúz, Ridván, the Twin Holy Birthdays, the Declaration and Martyrdom of the Báb, Ayyám-i-Há and the Fast.

Buddhist holidays in Theravada, East Asian and Japanese reckoning: Vesak, the Buddha's birthday, Magha and Asalha Puja, the rains retreat, Ullambana, Bodhi Day and Obon.

The Roman Catholic liturgical year since the 1970 calendar: Advent, Christmas, Lent, the Triduum, Easter and Ordinary Time in their liturgical colors, with every solemnity and great feast.

The years of the Chinese zodiac, each from its Lunar New Year: the animal, the element and the year's stem and branch.

The festivals of the Chinese lunar calendar — Lunar New Year, the Lantern, Dragon Boat and Mid-Autumn festivals, Qingming — with Korea's Seollal and Chuseok and Vietnam's Tết.

The Orthodox year on the old (Julian) calendar, shown on its Gregorian dates: Pascha, the Twelve Great Feasts, Great Lent and the fasts.

The Hindu festival year on the lunisolar calendar: Diwali, Holi, Navaratri and Dussehra, Janmashtami, Ganesh Chaturthi, Maha Shivaratri and more.

Observances the world shares, every year: Valentine's Day, April Fools' Day, Halloween, New Year's Eve and Leap Day. Each country's public holidays are on its own calendar.

The Islamic year on the Umm al-Qura calendar: Ramadan, the two Eids, the Hajj, the Hijri New Year, Ashura and the Mawlid.

The Jewish year: the High Holy Days, the pilgrimage festivals, Hanukkah and Purim, the fasts and Israel's days of remembrance — each across its days, from sundown.

The Protestant liturgical year of the Revised Common Lectionary: Advent, Christmas, the Season after Epiphany, Lent, Holy Week, Easter and the Season after Pentecost, with Reformation Day, All Saints' and Christmas Eve.

Sikh gurpurabs and festivals: Vaisakhi, Guru Nanak's and Guru Gobind Singh's birthdays, the martyrdoms of Guru Arjan and Guru Tegh Bahadur, Hola Mohalla and Bandi Chhor Divas.