>January was originally the eleventh month. Spring/March was the beginning of the new year.
>That being said, tomorrow would then be 11/3.
Who Decided January 1st Is the New Year?
(PARTIAL STORY)
The Julian calendar would be co-opted throughout many parts of Europe as the Roman Empire expanded, but its new year’s day didn’t stick everywhere. For much of medieval Christian Europe, Christmas Day, Dec. 25, marked the start of a new year, while in some other countries it fell on March 25, as part of the Feast of the Annunciation.
But the Julian calendar’s 11-minute error would have a cumulative effect over years: by the mid-15th century, it was off the solar cycle by an additional10 days.The Catholic Church noticed this mismatch, and in the 1570s Pope Gregory XIII introduced a new calendar that would address the discrepancy by making it so that no centurial year (i.e. 1700) gets the extra leap day unless the year is divisible by 400 (i.e. 2000). The Gregorian calendar also formalized Jan. 1 as the start of every new year.
Much of the world came to accept the Gregorian calendar, noted for its accuracy. Still, Great Britain and its American colonies did not quickly adopt it, refusing to recognize the authority of the Pope. For nearly 200 years, Britons used both calendars and dated documents twice. By 1752, however, the two calendars were off by 11 days, and Parliament in London relented to abandoning the Julian calendar.
https://time.com/6550127/new-year-celebration-january-calendar-date-history/