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| Caucasian Calendar | |
|---|---|
| Name | Caucasian Calendar |
| Type | Calendar |
| Region | Caucasus |
| Introduced | 19th century (various forms) |
| Used by | Armenians, Georgians, Azerbaijanis, Circassians, Ossetians |
Caucasian Calendar
The Caucasian Calendar was a set of regional calendrical systems and reforms used across the Caucasus by communities such as Armenia, Georgia, Azerbaijan, Chechnya, Dagestan and the North Caucasus. It incorporates influences from the Julian calendar, Gregorian calendar, Armenian calendar, Persian calendar, Islamic calendar, Byzantine calendar and indigenous seasonal reckonings related to the Kura River, Aras River, Greater Caucasus and Lesser Caucasus. The calendar informed agricultural cycles, liturgical cycles, fiscal accounting and diplomatic synchronisation between empires including the Russian Empire, Ottoman Empire, Safavid dynasty, Qajar dynasty and Byzantine Empire.
Regional timekeeping in the Caucasus combined elements from the Armenian Apostolic Church, Georgian Orthodox Church, Persian administrative practice, and imperial statutes of the Russian Empire. Local elites in Tbilisi, Yerevan, Baku, Ganja, Kutaisi, Batumi and Grozny used mixed regimens for taxation, liturgy, and seasonal fairs such as those at Nakhichevan and Derbent. Calendrical terms and month names show borrowings from Old Persian, Classical Armenian, Georgian and Turkic languages, and were recorded in manuscripts held at repositories like the Matenadaran, National Parliamentary Library of Georgia, Azerbaijan National Academy of Sciences and archives in Saint Petersburg.
Calendar practice evolved under the influence of dynasties and states including the Bagratid Armenia, Kingdom of Iberia (Kartli), the Kingdom of Georgia, the Ilkhanate, the Timurid Empire, Ottoman Empire, Safavid dynasty and the Russian Empire. Missionaries, merchants and scholars from Venice, Constantinople, Tehran, Moscow and Constantinople introduced astronomical tables from Ptolemy, Al-Biruni, Nicolaus Copernicus, Tycho Brahe, Johannes Kepler and later Pierre-Simon Laplace. Ecclesiastical councils of the Armenian Apostolic Church and the Georgian Orthodox Church debated adoption of the Gregorian reform and retained elements of the Julian calendar for liturgical computation. Contacts with the Safavid dynasty and Qajar dynasty brought the Persian calendar and Jalali calendar, while Muslim populations used the Islamic calendar for ritual observances tied to Ramadan, Eid al-Fitr and Eid al-Adha.
Month names and month lengths varied: some regions used 12 fixed solar months derived from the Armenian calendar and Persian calendar, while others observed lunar months of the Islamic calendar for religious purposes. Agricultural months were indexed to riverine cycles of the Kura River and Rioni River and to phenological markers such as the Anemone coronaria bloom and harvests of grape and wheat in the Telavi and Vayots Dzor districts. Administrative months used by officials in Tiflis Governorate and Erivan Governorate aligned with fiscal years under the Russian Empire and with feast days like Epiphany, Nativity of Jesus, Easter, Vardavar and the Feast of St. George in Georgian practice.
Distinct calendrical customs emerged among ethnic groups: Armenians retained the Armenian calendar for ecclesiastical chronology; Georgians used the Georgian calendar traditions conserved in the Chronicle of Kartli and medieval chronicles such as the Georgian Chronicles; Azerbaijanis and Lezgins navigated between Persian calendar administration and Islamic months; Circassians, Abkhazians, Ingush and Chechens preserved mountain pastoral seasonal reckoning linked to transhumance routes across the Greater Caucasus. Urban centres such as Baku became focal points where Russian Empire civil registers, Ottoman commercial calendars, and local religious timetables overlapped.
Calendrical practice was central to liturgical life in Etchmiadzin, Holy Trinity Cathedral, Shah Mosque influences and mosque observances in Sheki and Derbent. Feast cycles tied to saints like Gregory the Illuminator, Saint Nino, Saint George and local martyrs structured communal memory and pilgrimage to shrines such as Surb Hovhannes, Svetitskhoveli Cathedral and Gonio Fortress. Calendars underpinned market days in bazaars like those in Tbilisi, Yerevan, Ganja and facilitated legal timestamps in courts modeled on codes from Napoleonic Code-influenced Russian legal reforms and customary law in highland communities.
Reform attempts occurred during the 19th century and early 20th century under the Russian Empire and later the Soviet Union, with proposals influenced by Peter the Great’s modernising measures and later Soviet standardisation that promoted the Gregorian calendar for civil use while tolerating religious calendars for Armenian Apostolic Church, Georgian Orthodox Church and Muslim communities. Revolutionary and post-revolutionary transformations in 1917 Russian Revolution and policies by the Council of People's Commissars altered fiscal and civil registration, while institutions like the Academy of Sciences of the USSR documented calendrical transition. Today municipal administrations in Yerevan, Tbilisi, Baku and Autonomous Republics coordinate Gregorian civil calendars with liturgical calendars for public holidays and cultural festivals such as Nowruz, Vardavar, Tbilisoba and regional harvest festivals.
The Caucasian calendrical landscape must be compared to adjacent systems: the Persian calendar, Armenian calendar, Georgian calendar, Byzantine calendar, Julian calendar, Gregorian calendar and the Islamic calendar all informed practical synchronisation for diplomacy among states like the Ottoman Empire, Qajar dynasty, Russian Empire and later Soviet Union. Comparative studies reference astronomical tables by Ulugh Beg, Al-Biruni, Ptolemy, and modern chronologies produced by the International Astronomical Union and regional historians in archives from Yerevan to St. Petersburg to reconcile era names such as the Seleucid era, Anno Domini, Anno Persico reckonings, and epochal markers used in royal inscriptions and ecclesiastical canons.