September (Roman month) was adjusted to September 1 in the 5th century to coincide with the tax year. September (Roman month) September (from Latin "septem", "seven") or mensis September was originally the seventh of ten months on the ancient Roman calendar that began with March ("mensis Martius", "Mars' month"). It had 29 days. After the reforms that resulted in a 12-month year, September became the ninth month, but retained its name. September followed what was originally Sextilis, the "sixth" month, renamed "Augustus" in honor of the first Roman emperor, and preceded October, the "eighth" month that like September retained its numerical name contrary
Buddhist calendar the Buddhist Era (as the Buddhist calendar straddles the Gregorian calendar—currently from April to April). In Sri Lanka, the difference between BE and CE is 544. The calendar recognizes two types of months: synodic month and sidereal month. The Synodic months are used to compose the years while the 27 lunar sidereal days (Sanskrit: "nakshatra"), alongside the 12 signs of the zodiac, are used for astrological calculations. (The Burmese calendar also recognizes a solar month called "Thuriya Matha", which is defined as 1/12th of a year. But the solar month varies by the type of year such as tropical year,