SettingsSpecific calendars
360-day calendar
The 360-day calendar is a method of measuring durations used in financial markets, in computer models, in ancient literature, and in prophetic literary genres.
The 360-day calendar is a method of measuring durations used in financial markets, in computer models, in ancient literature, and in prophetic literary genres.
365-day calendar
A 365-day calendar consists of exactly 365 days per year (no leap days), and is primarily used in computer models and as an assumption in every-day calculations.
A 365-day calendar consists of exactly 365 days per year (no leap days), and is primarily used in computer models and as an assumption in every-day calculations.
Akan calendar
The Akan calendar is based on what the Akan call 'forty days'; Adaduanan.
The Akan calendar is based on what the Akan call 'forty days'; Adaduanan.
Armenian calendar
The Armenian calendar is the traditional calendar of Armenia.
The Armenian calendar is the traditional calendar of Armenia.
Assyrian calendar
The Assyrian calendar is a lunar-based calendar that begins in the year 4750 BC, inspired by an estimate of the date of the first temple at Ashur, notably based on a series of articles published...
The Assyrian calendar is a lunar-based calendar that begins in the year 4750 BC, inspired by an estimate of the date of the first temple at Ashur, notably based on a series of articles published...
Astronomical year numbering
Astronomical year numbering is based on AD/CE year numbering, but follows normal decimal integer numbering more strictly.
Astronomical year numbering is based on AD/CE year numbering, but follows normal decimal integer numbering more strictly.
Azes era
Vikram Samvat (Bikram Sambat, Vikram Samvat or Vikram Samwat, Devanagari:विक्रम संवत्, abbreviated "V.S.") is the calendar established by Indian emperor Vikramaditya.
Vikram Samvat (Bikram Sambat, Vikram Samvat or Vikram Samwat, Devanagari:विक्रम संवत्, abbreviated "V.S.") is the calendar established by Indian emperor Vikramaditya.
Bahá'í calendar
The Bahá'í calendar, also called the Badí‘ calendar, used by Bábism and the Bahá'í Faith, is a solar calendar with regular years of 365 days, and leap years of 366 days.
The Bahá'í calendar, also called the Badí‘ calendar, used by Bábism and the Bahá'í Faith, is a solar calendar with regular years of 365 days, and leap years of 366 days.
Balinese calendar
The Pawukon is a 210 day calendar that has its origins in the Hindu religion in Bali, Indonesia.
The Pawukon is a 210 day calendar that has its origins in the Hindu religion in Bali, Indonesia.
Balinese saka calendar
The Balinese saka calendar is one of two calendars used on the Indonesian island of Bali.
The Balinese saka calendar is one of two calendars used on the Indonesian island of Bali.
Berber calendar
The Berber calendar is the agricultural calendar that is traditionally used in North Africa regions.
The Berber calendar is the agricultural calendar that is traditionally used in North Africa regions.
Bikrami calendar
A Bikrami, or Desi year, is a solar year which starts on the 13 of March, or the start of Spring, and consists of 365 days.
A Bikrami, or Desi year, is a solar year which starts on the 13 of March, or the start of Spring, and consists of 365 days.
Broadcast calendar
The broadcast calendar is a standardized calendar used primarily for the planning and purchase of radio and television programs and advertising.
The broadcast calendar is a standardized calendar used primarily for the planning and purchase of radio and television programs and advertising.
Buddhist calendar
The Buddhist calendar is used on mainland Southeast Asia in the countries of Thailand, Cambodia, Laos, Burma (officially known as Myanmar) and Sri Lanka in several related forms.
The Buddhist calendar is used on mainland Southeast Asia in the countries of Thailand, Cambodia, Laos, Burma (officially known as Myanmar) and Sri Lanka in several related forms.
Byzantine calendar
The Byzantine calendar, also "Creation Era of Constantinople," or "Era of the World" (, also or ) was the calendar used by the Eastern Orthodox Church from c. 691 to 1728 in the Ecu...
The Byzantine calendar, also "Creation Era of Constantinople," or "Era of the World" (, also or ) was the calendar used by the Eastern Orthodox Church from c. 691 to 1728 in the Ecu...
Calendar of saints
The calendar of saints is a traditional Catholic
Method of organizing a liturgical year by associating each day with one or more saints and referring to the feast day of said saint.
The calendar of saints is a traditional Catholic
Method of organizing a liturgical year by associating each day with one or more saints and referring to the feast day of said saint.
Caspian calendar
The Tabarian calendar is the indigenous solar calendar of the Mazandaranis.
The Tabarian calendar is the indigenous solar calendar of the Mazandaranis.
Celtic calendar
The Celtic calendar is a compilation of pre-Christian Celtic systems of timekeeping, including the Gaulish Coligny calendar, used by Celtic countries to define the beginning and length of the da...
The Celtic calendar is a compilation of pre-Christian Celtic systems of timekeeping, including the Gaulish Coligny calendar, used by Celtic countries to define the beginning and length of the da...
Cham calendar
The Cham calendar is a lunar calendar used by the Cham people of Vietnam since ancient times.
The Cham calendar is a lunar calendar used by the Cham people of Vietnam since ancient times.
Chronography of 354
The Chronography of 354, also known as the Calendar of 354, was a 4th century illuminated manuscript, which was produced in 354 AD for a wealthy Roman Christian named Valentinus.
The Chronography of 354, also known as the Calendar of 354, was a 4th century illuminated manuscript, which was produced in 354 AD for a wealthy Roman Christian named Valentinus.
Decimal calendar
A decimal calendar contains either ten days per week, a multiple of ten days in a month, or ten months per year.
A decimal calendar contains either ten days per week, a multiple of ten days in a month, or ten months per year.
Discordian calendar
The Discordian or Erisian calendar is an alternative calendar used by some adherents of Discordianism.
The Discordian or Erisian calendar is an alternative calendar used by some adherents of Discordianism.
Dreamspell
The Dreamspell is an esoteric calendar based on a modern interpretation of the Maya calendar by New Age spiritualist, Mayanist philosopher, and author José Argüelles, initiated in 1987 and relea...
The Dreamspell is an esoteric calendar based on a modern interpretation of the Maya calendar by New Age spiritualist, Mayanist philosopher, and author José Argüelles, initiated in 1987 and relea...
Ethiopian calendar
The Ethiopian calendar, also called the Ge'ez calendar, is the principal calendar used in Ethiopia and also serves as the liturgical calendar for Christians in Eritrea belonging to the Eri...
The Ethiopian calendar, also called the Ge'ez calendar, is the principal calendar used in Ethiopia and also serves as the liturgical calendar for Christians in Eritrea belonging to the Eri...
Etos Kosmou
Etos Kosmou (Έτος Κόσμου) was an early Byzantine and Roman Christian chronology system of measuring time introduced by Panodorus of Alexandria, Hippolytus of Rome, Sulpicius Severus, Annia...
Etos Kosmou (Έτος Κόσμου) was an early Byzantine and Roman Christian chronology system of measuring time introduced by Panodorus of Alexandria, Hippolytus of Rome, Sulpicius Severus, Annia...
Gaelic calendar
The Gaelic calendar (also known as the Irish calendar) is a pre-Christian Celtic system of timekeeping used during Ireland's Gaelic era and still in popular use today to define the beginni...
The Gaelic calendar (also known as the Irish calendar) is a pre-Christian Celtic system of timekeeping used during Ireland's Gaelic era and still in popular use today to define the beginni...
Greyhawk Calendar
The Greyhawk Calendar is a fictional calendar used in the World of Greyhawk campaign setting for the Dungeons and Dragons role-playing game.
The Greyhawk Calendar is a fictional calendar used in the World of Greyhawk campaign setting for the Dungeons and Dragons role-playing game.
Haab'
The Haab' is part of the Maya calendric system.
The Haab' is part of the Maya calendric system.
Inter gravissimas
Inter gravissimas was a papal bull issued by Pope Gregory XIII on February 24, 1582.
Inter gravissimas was a papal bull issued by Pope Gregory XIII on February 24, 1582.
Iranian calendars
The Iranian calendars or sometimes called Persian calendars are a succession of calendars invented or used for over two millennia in Greater Iran.
The Iranian calendars or sometimes called Persian calendars are a succession of calendars invented or used for over two millennia in Greater Iran.
Irish calendar
The Irish calendar is a pre-Christian Celtic system of timekeeping used during Ireland's Gaelic era and still in popular use today to define the beginning and length of the day, the week, the mo...
The Irish calendar is a pre-Christian Celtic system of timekeeping used during Ireland's Gaelic era and still in popular use today to define the beginning and length of the day, the week, the mo...
ISO 8601
ISO 8601 Data elements and interchange formats – Information interchange – Representation of dates and times is an international standard covering the exchange of date and time-related data.
ISO 8601 Data elements and interchange formats – Information interchange – Representation of dates and times is an international standard covering the exchange of date and time-related data.
Javanese calendar
The Javanese calendar is a calendar still in use by the Javanese people of Indonesia concurrently with two other important calendars, the Gregorian calendar and the Islamic calendar.
The Javanese calendar is a calendar still in use by the Javanese people of Indonesia concurrently with two other important calendars, the Gregorian calendar and the Islamic calendar.
Ke (unit)
The ke is a traditional Chinese unit of decimal time lasting approximately a quarter of a western hour.
The ke is a traditional Chinese unit of decimal time lasting approximately a quarter of a western hour.
Korean calendar
The traditional Korean calendar is a lunisolar calendar, like the traditional calendars of other East Asian countries.
The traditional Korean calendar is a lunisolar calendar, like the traditional calendars of other East Asian countries.
Kuwaiti algorithm
The Kuwaiti algorithm is used by Microsoft to convert between Gregorian calendar dates and Islamic calendar dates.
The Kuwaiti algorithm is used by Microsoft to convert between Gregorian calendar dates and Islamic calendar dates.
Lithuanian calendar
The Lithuanian calendar is unusual among Western countries in that neither the names of the months nor the names of the weekdays are derived from Greek or Norse mythology.
The Lithuanian calendar is unusual among Western countries in that neither the names of the months nor the names of the weekdays are derived from Greek or Norse mythology.
Lunar calendar
A lunar calendar is a calendar that is based on cycles of the lunar phase.
A lunar calendar is a calendar that is based on cycles of the lunar phase.
Malayalam calendar
Malayalam Calendar is a solar and sidereal Hindu calendar used in Kerala, India.
Malayalam Calendar is a solar and sidereal Hindu calendar used in Kerala, India.
Mesoamerican Long Count calendar
The Mesoamerican Long Count calendar is a non-repeating, vigesimal (base-20) and base-18 calendar used by several Pre-Columbian Mesoamerican cultures, most notably the Maya.
The Mesoamerican Long Count calendar is a non-repeating, vigesimal (base-20) and base-18 calendar used by several Pre-Columbian Mesoamerican cultures, most notably the Maya.
Nepal Sambat
Nepal Sambat (Nepal Bhasa: नेपाल सम्बत) is the national lunar calendar of Nepal.
Nepal Sambat (Nepal Bhasa: नेपाल सम्बत) is the national lunar calendar of Nepal.
Paschal Full Moon
Notionally, the paschal full moon refers to the ecclesiastical full moon of the northern spring used in the determination of the date of Easter.
Notionally, the paschal full moon refers to the ecclesiastical full moon of the northern spring used in the determination of the date of Easter.
Polemius Silvius
Polemius Silvius (fl. 5th century) was the author of an annotated Julian calendar that attempted to integrate the traditional Roman festival cycle with the new Christian holy days.
Polemius Silvius (fl. 5th century) was the author of an annotated Julian calendar that attempted to integrate the traditional Roman festival cycle with the new Christian holy days.
Proleptic Gregorian calendar
The proleptic Gregorian calendar is produced by extending the Gregorian calendar backward to dates preceding its official introduction in 1582.
The proleptic Gregorian calendar is produced by extending the Gregorian calendar backward to dates preceding its official introduction in 1582.
Renaming of Turkmen months and days of week, 2002
On August 10, 2002, the government of Turkmenistan adopted a law to rename all the months and most of the days of week.
On August 10, 2002, the government of Turkmenistan adopted a law to rename all the months and most of the days of week.
Revised Julian calendar
The Revised Julian calendar, also known as the Rectified Julian calendar, or, less formally, New Calendar, is a calendar, originated in 1923, which effectively discontinued the 340 y...
The Revised Julian calendar, also known as the Rectified Julian calendar, or, less formally, New Calendar, is a calendar, originated in 1923, which effectively discontinued the 340 y...
Runic calendar
The Runic calendar is a perpetual calendar based on the 19 year long Metonic cycle of the Moon.
The Runic calendar is a perpetual calendar based on the 19 year long Metonic cycle of the Moon.
Tamil calendar
The Tamil calendar is used in Tamil Nadu and Puducherry in India, and by the Tamil population in Malaysia, Singapore, Mauritius and Sri Lanka.
The Tamil calendar is used in Tamil Nadu and Puducherry in India, and by the Tamil population in Malaysia, Singapore, Mauritius and Sri Lanka.
Thai lunar calendar
The Thai lunar calendar, Dai calendar, or Tai calendar, is Thailand's version of the lunisolar Buddhist calendar.
The Thai lunar calendar, Dai calendar, or Tai calendar, is Thailand's version of the lunisolar Buddhist calendar.
Thai solar calendar
The Thai solar calendar, Suriyakhati was adopted by King Chulalongkorn in AD 1888 as the Siamese version of the Gregorian calendar.
The Thai solar calendar, Suriyakhati was adopted by King Chulalongkorn in AD 1888 as the Siamese version of the Gregorian calendar.
Tibetan calendar
The Tibetan calendaris a lunisolar calendar, that is, the Tibetan year is composed of either 12 or 13 lunar months, each beginning and ending with a new moon.
The Tibetan calendaris a lunisolar calendar, that is, the Tibetan year is composed of either 12 or 13 lunar months, each beginning and ending with a new moon.
Tonalpohualli
The tonalpohualli, a Nahuatl word meaning "count of days", is a 260-day sacred period (often termed a "year") in use in pre-Columbian Mesoamerica, especially among the Aztecs.
The tonalpohualli, a Nahuatl word meaning "count of days", is a 260-day sacred period (often termed a "year") in use in pre-Columbian Mesoamerica, especially among the Aztecs.
Traditional Burmese calendar
The traditional Burmese calendar is a lunisolar calendar based on both the phases of the moon and the motion of the sun.
The traditional Burmese calendar is a lunisolar calendar based on both the phases of the moon and the motion of the sun.
Tulu calendar
Tulu calendar is one of the oldest traditional solar Indian calendar generally used in the regions of South-West Karnataka and Northern Kerala, India.
Tulu calendar is one of the oldest traditional solar Indian calendar generally used in the regions of South-West Karnataka and Northern Kerala, India.
Tzolk'in
Tzolk'in (from the revised Guatemala Mayan languages Academy orthography, which is preferred by the linguists of the Summer Institute of Linguistics, formerly and commonly tzolkin) is ...
Tzolk'in (from the revised Guatemala Mayan languages Academy orthography, which is preferred by the linguists of the Summer Institute of Linguistics, formerly and commonly tzolkin) is ...
Vikram Samvat
Vikram Samvat (Bikram Sambat, Vikram Samvat Vikram Samwat or Vikram's Era, Devanagari:विक्रम संवत्, abbreviated "V.S." or "B.S") is the calendar established by Indian emp...
Vikram Samvat (Bikram Sambat, Vikram Samvat Vikram Samwat or Vikram's Era, Devanagari:विक्रम संवत्, abbreviated "V.S." or "B.S") is the calendar established by Indian emp...
Vrishchikam
Vrishchikam is the first month of kollavarsham, the Malayalam Calendar.
Vrishchikam is the first month of kollavarsham, the Malayalam Calendar.
World Season Calendar
The World Season Calendar is a proposal for calendar reform by author Isaac Asimov.
The World Season Calendar is a proposal for calendar reform by author Isaac Asimov.
Xhosa calendar
By the traditional Xhosa calendar, the year began in June and ended in May, when Canopus, a large star visible in the Southern Hemisphere, signaled the time for harvesting.
By the traditional Xhosa calendar, the year began in June and ended in May, when Canopus, a large star visible in the Southern Hemisphere, signaled the time for harvesting.
Yoruba calendar
The Yoruba calendar (Kojoda) year starts from 3 June to 2 June of the following year.
The Yoruba calendar (Kojoda) year starts from 3 June to 2 June of the following year.
Zoroastrian calendar
The Zoroastrian calendar is a religious Iranian calendar used by adherents of the Zoroastrian faith, and is an approximation of the tropical solar calendar.
The Zoroastrian calendar is a religious Iranian calendar used by adherents of the Zoroastrian faith, and is an approximation of the tropical solar calendar.