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The Jalali calendar, also referred to as Malikshahi and Maliki, [1] is a solar calendar compiled during the reign of Jalaluddin Malik-Shah I, the Sultan of the Seljuk Empire (1072–1092 CE), by the order of Grand Vizier Nizam al-Mulk, using observations made in the cities of Isfahan (the capital of the Seljuks), Rey, and Nishapur.
It is a solar calendar and is the one Iranian calendar that is the most similar to the Gregorian calendar, being based on the Earth's orbit around the Sun. It begins on the March equinox as determined by the astronomical calculation for the Iran Standard Time meridian (52.5°E, UTC+03:30 ) and has years of 365 or 366 days.
This is a list of calendars.Included are historical calendars as well as proposed ones. Historical calendars are often grouped into larger categories by cultural sphere or historical period; thus O'Neil (1976) distinguishes the groupings Egyptian calendars (Ancient Egypt), Babylonian calendars (Ancient Mesopotamia), Indian calendars (Hindu and Buddhist traditions of the Indian subcontinent ...
The Iranian calendar or Iranian chronology (Persian: گاهشماری ایرانی, Gâh Šomâriye Irâni) are a succession of calendars created and used for over two millennia in Iran, also known as Persia. One of the longest chronological records in human history, the Iranian calendar has been modified many times for administrative purposes.
The Tabular Islamic calendar (Arabic: التقويم الهجري المجدول, romanized: altaqwim alhijriu almujadwal) is a rule-based variation of the Islamic calendar. It has the same numbering of years and months, but the months are determined by arithmetical rules rather than by observation or astronomical calculations.
The Islamic calendar is a purely lunar calendar and has a year, whose start drifts through the seasons and so is not a solar calendar. The Maya Tzolkin calendar, which follows a 260-day cycle, has no year, therefore it is not a solar calendar. Also, any calendar synchronized only to the synodic period of Venus would not be solar.
Mark your calendars! Check out this list of April holidays, observances and awareness months. Find a reason to celebrate each day, week or all month long. ... April 21 to 27: National Volunteer ...
It was from the work at the observatory that the Jalali Calendar was adopted. [47] He thought highly of the art of architecture as well, as he enjoyed building new and splendid mosques in his capital, Isfahan. He was religiously tolerant which is supported by the fact that during his reign, subjects of the Seljuk Empire enjoyed internal peace ...