Who began the tradition of celebrating the first day of a new year on Jan. 1?
The early Roman calendar was 304 days and divided into 10 months. The spring Equinox marked the beginning of each new year. As the centuries ticked by, the calendar fell out of sync with the sun. Roman emperor Julius Caesar decided to correct the problem in 46 B.C. He consulted the leading mathematicians and astronomers of his time, resulting in formulation of the Julian calendar, making Jan. 1 the first day of the year. Source: History.com
Gaius Julius Caesar (Latin: CAIVS IVLIVS CAESAR, pronounced [ˈɡaː.i.ʊs ˈjuː.li.ʊs ˈkae̯.sar], 13 July 100 BC – 15 March 44 BC), usually called Julius Caesar, was a Roman politician and general who played a critical role in the events that led to the demise of the Roman Republic and the rise of the Roman Empire.