In which calendar did the year AM5774 begin on 4th September 2013?
Calendar year length of 365.25 days, and the Hebrew calendar has an average length of 365.2468 days. The Islamic calendar is a lunar calendar consisting of 12 months in a year of 354 or 355 days. The astronomer's mean tropical year, which is averaged over equinoxes and solstices, is currently 365.24219 days, slightly shorter than the average length of the year in most calendars, but the astronomer's value changes over time, so William Herschel's suggested correction to the Gregorian calendar may become unnecessary by the year 4000. The calendar year can be divided into four quarters, often abbreviated as Q1, Q2, Q3,
Bahá'í calendar 1st Kull-i-Shay' started on 21 March 2015, and the 11th Váḥid will begin in 2034. The current Bahá'í year, year 175 BE (21 March 2018 – 20 March 2019), is year Dál (D) of the 10th Váḥid of the 1st Kull-i-Shay'. The 2nd Kull-i-Shay' will begin in 2205. The concept of a 19-year cycle has existed in some form since the 4th century BCE. The Metonic cycle represents an invented measure that approximately correlates solar and lunar markings of time and which appears in several calendar systems. Bahá'í calendar The Bahá'í Calendar, also called the Badíʿ Calendar ("Badíʿ" means "wondrous"