|Wide use||Astronomical · Gregorian · Islamic · ISO|
|Lunisolar · Solar · Lunar|
|Selected use||Assyrian · Armenian · Attic · Aztec (Tonalpohualli – Xiuhpohualli) · Babylonian · Bahá'í · Bengali · Berber · Bikram Samwat · Buddhist · Celtic · Chinese · Coptic · Egyptian · Ethiopian · Calendrier Républicain · Germanic · Hebrew · Hellenic · Hindu · Indian · Iranian · Irish · Japanese · Javanese · Juche · Julian · Korean · Lithuanian · Malayalam · Maya (Tzolk'in – Haab') · Minguo · Nanakshahi · Nepal Sambat · Pawukon · Pentecontad calendar · Rapa Nui · Roman · Soviet · Tamil · Thai (Lunar – Solar) · Tibetan · Burmese . The word Calendar consist of two words 1 Cal ( in Pashto means Year in Hindi and Persian is Sal- also means Year In current use Assyrian calendar Astronomical year numbering Bahá'í calendar Bengali calendar Astronomical year numbering is based on AD ( Anno Domini)/CE ( Common Era) year numbering but follows normal Decimal Integer numbering more strictly The Gregorian calendar is the most widely used Calendar in the world today The Islamic calendar or Muslim calendar ( Arabic: التقويم الهجري at-taqwīm al-hijrī; Persian: تقویم هجری قمری The ISO week date system is a Leap week calendar system that is part of the ISO 8601 date and time standard A lunisolar calendar is a Calendar in many Cultures whose date indicates both the Moon phase and the time of the solar Year. A solar calendar is a Calendar whose dates indicate the position of the earth on its revolution around the Sun (or equivalently the apparent position of the sun moving A lunar calendar is a Calendar that is based on cycles of the Moon phase. This article is about the calendar introduced in the 1950s See Old Assyrian calendar for the ancient calendar The Armenian calendar is the traditional calendar of Armenia. The Attic calendar is the Calendar that was in use in ancient Attica, the ancestral territory of the Athenian Polis. The Aztec calendar is the Calendar system that was used by the Aztecs as well as other Pre-Columbian peoples of central Mexico. The tonalpohualli, a Nahuatl word meaning "count of days" is a 260-day sacred period (often termed a " Year " in use in Pre-Columbian The Xiuhpohualli was a 365-day Calendar used by the Aztecs and other Pre-Columbian Nahua peoples in central Mexico The Babylonian calendar was a Lunisolar calendar with years consisting of 12 Lunar months each beginning when a new crescent moon was first sighted low The Bahá'í calendar, also called the Badí‘ calendar, used by the Bahá'í Faith, is a Solar calendar with regular years of 365 days and Leap The Bengali calendar ( বঙ্গাব্দ Bônggabdo or বাংলা সন Bangla Shôn) or Bangla calendar is a traditional solar Calendar The Berber calendar is the annual Calendar used by Berber people in North Africa. Bikram Samwat ( Bikram Sambat, or Vikram Samvat, Devnagari:बिक्रम संवत abbreviated "B The Buddhist calendar is used on mainland Southeast Asia in the countries of Cambodia, Laos, Thailand, Myanmar (formerly Burma The term Celtic calendar is used to refer to a variety of calendars used by Celtic-speaking peoples at different times in history The Chinese calendar is lunisolar, incorporating elements of a Lunar calendar with those of a Solar calendar. The Coptic calendar, also called the Alexandrian calendar, is used by the Coptic Orthodox Church and still used in Egypt The ancient civil Egyptian calendar had a year that was 365 days long and was divided into 12 months of 30 days each plus 5 extra days (epagomenes Greek ἐπαγόμεναι The Ethiopian calendar ( Amharic: የኢትዮጵያ ዘመን አቆጣጠር ye'Ītyōṗṗyā zemen āḳoṭaṭer) also called the Ge'ez calendar, The French Republican Calendar or French Revolutionary Calendar was a Calendar proposed during the French Revolution, and used by the French government The Germanic calendars were the regional agricultural Almanacs used amongst the Germanic peoples prior to the adoption of the Julian and later the Gregorian The Hebrew calendar (הלוח העברי ha'luach ha'ivri) or Jewish calendar is a Lunisolar calendar used by Jews for predominantly religious The Hellenic calendar &mdashor more properly the Hellenic calendars, for there was no uniform calendar imposed upon all of Classical Greece &mdashbegan in most Greek The Hindu calendar used in ancient times has undergone many changes in the process of regionalization and today there are several regional Indian Calendars, as The Indian national calendar (sometimes called Saka calendar) is the official civil calendar in use in India. The Iranian calendar or Solar Hejri (تقویم هجری شمسی؛ سالنمای هجری خورشیدی Taqwim Hejri Shamsi Salanmay Hejri Khurshidi) is an astronomical The Irish calendar does not observe the typical astronomical seasons (beginning in the Northern Hemisphere on the Equinoxes and Solstices, or the meteorological seasons Since January 1, 1873, Japan has used the Gregorian calendar, with local names for the months and mostly fixed holidays The Javanese calendar is a Calendar still in use by the Javanese people of Indonesia concurrently with two other important calendars the Gregorian The Juche Idea (주체사상 Juche Sasang) is the official state Ideology of North Korea and the Political system based on it The Revised Julian calendar or less formally New Calendar, is a Calendar scheme originated in 1923 which effectively discontinued the 340 years of divergence between The traditional Korean calendar is a Lunisolar calendar which like the traditional calendars of other East Asian countries was based on the Chinese 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 Malayalam calendar (also known as Malayalam Era or Kollavarsham) is a solar Sidereal calendar used in the state of Kerala in South India The Maya calendar is a system of distinct Calendars and Almanacs used by the Maya civilization of Pre-Columbian Mesoamerica, and by Tzolk'in (in the revised Guatemala Mayan languages Academy Orthography which is now preferred formerly and commonly tzolkin) is the name bestowed by The Haab' is part of the Maya calendric system used by peoples of the Pre-Columbian Maya civilization. The Republic of China calendar (民國紀元 is the method of numbering years currently used in the Republic of China ( Taiwan, Penghu, Kinmen The Nanakshahi (ਨਾਨਕਸ਼ਾਹੀ nānakashāhī) calendar is a Solar calendar that was adopted by the Shiromani Gurdwara Prabhandak Committee The Lunar calendar Nepal Sambat ( Nepal Bhasa: नेपाल सम्बत is commonly used in the Kathmandu valley of Nepal. The Pentecontad Calendar is a unique agricultural Calendar system thought to be of Amorite origin in which the year is broken down into seven periods of fifty days The Rapa Nui calendar was the indigenous Lunisolar calendar of Easter Island. The Roman calendar changed its form several times in the time between the foundation of Rome and the fall of the Roman Empire. }The Tamil Calendar is used in Tamil Nadu, Kerala and Puducherry in India, and by the Tamil population in Malaysia, The Thai lunar calendar ( Thai: ปฏิทินจันทรคติ Patitin Chantarakati) (literally Against-the-Sun Moon-Ways) is Thailand The Thai solar calendar, Suriyakati (สุริยคติ has been the official and prevalent Calendar in Thailand since it was adopted by King The Tibetan calendar is 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 traditional Burmese calendar is a Lunisolar calendar based on both the phases of the moon and the motion of the sun Vietnamese· Xhosa · Zoroastrian|
|Runic · Mesoamerican (Long Count – Calendar Round)|
|Julian calendar · Calendar of saints · Eastern Orthodox liturgical calendar · Liturgical year|
|Rarely used||Darian calendar · Discordian calendar|
|Display types and applications||Perpetual calendar · Wall calendar · Economic calendar|
The Soviet revolutionary calendar was in use in the USSR from 1929 to 1940. This article is about the Vietnamese holiday For the 1968 military operation that began on that holiday see Tết Offensive. By the traditional Xhosa calendar, the year began in June and ended in May when Canopus, a large star visible in the Southern Hemisphere, signalled the The Zoroastrian calendar is a religious Calendar used by members of the Zoroastrian faith and it is an approximation of the (tropical Solar calendar. The Runic calendar is a Perpetual calendar based on the 19 year long Metonic cycle of the Moon Mesoamerican calendars are the calendrical systems devised and used by the Pre-Columbian cultures of Mesoamerica. In the Mesoamerican calendars, Calendar Round dates are composed by interlacing the dates of a 260-day period ( Tzolk'in in the Maya Calendar, Tonalpohualli The Julian calendar, a reform of the Roman calendar, was introduced by Julius Caesar in 46 BC and came into force in 45 BC (709 Ab urbe condita The Calendar of saints is a traditional Christian method of organizing a Liturgical year on the level of days by associating each day with one or more Saints The Eastern Orthodox liturgical calendar describes and dictates the rhythm of the life of the Eastern Orthodox Church. The liturgical year, also known as the Christian year, consists of the cycle of liturgical seasons in Christian churches which determines when The Darian Calendar is a proposed system of time-keeping designed to serve the needs of any possible future human settlers on the planet Mars. The Discordian or Erisian calendar is an alternative Calendar used by some adherents of Discordianism. A perpetual calendar is a Calendar which is good for a span of many years such as the Runic calendar. A wall calendar is a Calendar intended for placement on a wall Economic calendar is a type of Calendar that is intended to inform financiers and traders about the scheduled major economic numbers (like CPI, Events 627 - Battle of Nineveh: A Byzantine army under Emperor Heraclius defeats Emperor Khosrau II 's Persian Year 1937 ( MCMXXXVII) was a Common year starting on Friday (link will display the full calendar of the Gregorian calendar. The Supreme Soviet of the USSR (Верхо́вный Сове́т СССР Verkhóvnyj Sovét SSSR) was the highest legislative body in the Soviet Union in The Union of Soviet Socialist Republics (USSR was a constitutionally Socialist state that existed in Eurasia from 1922 to 1991
Shortly after the October Revolution of 1917, Vladimir Lenin had decreed to change the calendar in the Soviet Union from the Julian calendar to the Gregorian calendar. The October Revolution (Октябрьская революция Oktyabrskaya revolyutsiya) also known as the Soviet Revolution The word Calendar consist of two words 1 Cal ( in Pashto means Year in Hindi and Persian is Sal- also means Year The Union of Soviet Socialist Republics (USSR was a constitutionally Socialist state that existed in Eurasia from 1922 to 1991 The Julian calendar, a reform of the Roman calendar, was introduced by Julius Caesar in 46 BC and came into force in 45 BC (709 Ab urbe condita The Gregorian calendar is the most widely used Calendar in the world today This change involved bypassing the days from February 1 until February 13, 1918. Events 1327 - Teenaged Edward III is crowned King of England, but the country is ruled by his mother Queen Events 1258 - Baghdad falls to the Mongols, and the Abbasid Caliphate is destroyed Year 1918 ( MCMXVIII) was a Common year starting on Tuesday (link will display the full calendar of the Gregorian calendar (or a Common
Starting on October 1, 1929, as an experiment, a new rationalized version of the calendar was introduced. Events 331 BC - Alexander the Great defeats Darius III of Persia in the Battle of Gaugamela. Year 1929 ( MCMXXIX) was a Common year starting on Tuesday (link will display the full calendar of the Gregorian calendar. In this version, all weeks had 5 days, all months had 30 days and the remaining five days of a year were added as holidays in between, not belonging to any month or week. These days were:
The abolition of the seven-day week in favor of a five-day week was in part an anti-religious measure to banish the Christian Sunday as day of rest. Events 1648 - Eighty Years' War: The Treaty of Münster is signed ending the conflict between the Netherlands and Spain Labour Day is an annual Holiday celebrated all over the world that resulted from efforts of Events 313 - Roman emperor Licinius unifies the entire Eastern Roman Empire under his rule Events 1492 - The Ensisheim Meteorite the oldest Meteorite with a known date of impact strikes the Earth around noon in a Wheat A leap year (or intercalary year) is a year containing one or more extra days (or in the case of Lunisolar calendars an extra month in order to keep the occurs in some calendars unlike the Gregorian calendar A week (also called sennight or sevennight) is a unit of Time longer than a Day and shorter than a Month. Christianity ( Greek Χριστιανισμός from the word Xριστός ( Christ)is a monotheistic Religion centered on the life and teachings (In this it closely parallels the French Republican Calendar. The French Republican Calendar or French Revolutionary Calendar was a Calendar proposed during the French Revolution, and used by the French government ) Under the five-day week all workers were divided into five groups according to colour (yellow, pink, red, purple, green), and each group had one day of the week, according to the colour, as their day of rest. The intention was to improve industrial efficiency by avoiding the regular interruption of a non-working day. 
Although workers had more days off work under the new system (one day in five instead of one day in seven), the separation into five groups made family and social life inconvenient and proved very unpopular. In addition, the projected efficiency gains of the shorter week did not show up in reality.
It appears that the Gregorian calendar kept being used in the Soviet Union during this period. This is confirmed by consulting the successive dates in daily issues of Pravda, the official newspaper of the Communist Party, in which February had 28 days in 1930 and 1931. Pravda (Правда "The Truth" was a leading Newspaper of the Soviet Union and an official organ of the Central Committee of the
Starting December 1, 1931, the Western schedule of month lengths was restored. Events 800 - Charlemagne judges the accusations against Pope Leo III in the Vatican Year 1931 ( MCMXXXI) was a Common year starting on Thursday (link will display full 1931 calendar of the Gregorian calendar. The 5-day workweek was replaced with the 6-day workweek, with a common day of rest on every 6th, 12th, 18th, 24th and 30th of the month. The 31st was kept outside this six-day week cycle and varied between a holiday and a working day, and March 1st was used instead of February 30th.
In practice the Sunday rest tradition proved hard to eliminate, with workers often taking both Sunday and the new day of rest. Finally, in 1940, the old seven day week was restored.