> The historical start "Historical" meaning going back to the Roman Republic: > We can partly thank the Roman king Numa Pompilius. According to tradition, dur

> The historical start "Historical" meaning going back to the Roman Republic: > We can partly thank the Roman king Numa Pompilius. According to tradition, during his reign (c. 715–673 BCE) Numa revised the Roman republican calendar so that January replaced March as the first month. It was a fitting choice, since January was named after Janus, the Roman god of all beginnings; March celebrated Mars, the god of war. (Some sources claim that Numa also created the month of January.) However, there is evidence that January 1 was not made the official start of the Roman year until 153 BCE. > In 46 BCE Julius Caesar introduced more changes, though the Julian calendar, as it became known, retained January 1 as the year’s opening date. * https://www.britannica.com/story/why-does-the-new-year-start-on-january-1 https://www.britannica.com/story/why-does-the-new-year-start... > The Romans did not have records of their early calendars but, like modern historians, assumed the year originally began in March on the basis of the names of the months following June. The consul M. Fulvius Nobilior (r. 189 BC) wrote a commentary on the calendar at his Temple of Hercules Musarum that claimed January had been named for Janus because the god faced both ways,[83][where?] suggesting it had been instituted as a first month.[citation needed] It was, however, usually said to have been instituted along with February, whose nature and festivals suggest it had originally been considered the last month of the year. The consuls' term of office—and thus the order of the years under the republic—seems to have changed several times. Their inaugurations were finally moved to January 1(Kal. Ian.) in 153 BC to allow Q. Fulvius Nobilior to attack Segeda in Spain during the Celtiberian Wars, before which they had occurred on March 15 (Eid. Mart.).[87] There is reason to believe the inauguration date had been May 1during the 3rd century BC until 222 BC[citation needed] and Livy mentions earlier inaugurations on May 15 (Eid. Mai.), July 1 (Kal. Qui.), August 1 (Kal. Sex.), October 1(Kal. Oct.), and December 15 (Eid. Dec.).[88][where?] Under the Julian calendar, the year began on January 1 but years of the Indiction cycle began on September 1. * https://en.wikipedia.org/wiki/Roman_calendar#Years https://en.wikipedia.org/wiki/Roman_calendar#Years