In B.C. 45, Julius Caesar introduced the Julian calendar (which had no intercalary year) and, similar to the Gregorian calendar, January 1st became New Year's Day (the first day of the new year). |
紀元前45年、ユリウス・カエサルがユリウス暦(閏年が無い)を導入、1 January がグレゴリオ暦同様、正月(新年初日)になった。 |