Analysis of information sources in references of the Wikipedia article "New Year" in English language version.
The town of Louvain, belonging to the duchy of Brabant, used the Easter Style, beginning the year at Holy Saturday.
Late in 1872 Japan adopted the Gregorian calendar and 1872.12.3 became 1 January 1873
Indeed the adoption of the Gregorian calendar was the very first law passed by the new Republic of China. On December 31, 1911, the national senate passed a resolution to adopt the solar calendar immediately, regarding the next day as the first day of the first month of the first year of the Republic of China.
Late in 1872 Japan adopted the Gregorian calendar and 1872.12.3 became 1 January 1873
Indeed the adoption of the Gregorian calendar was the very first law passed by the new Republic of China. On December 31, 1911, the national senate passed a resolution to adopt the solar calendar immediately, regarding the next day as the first day of the first month of the first year of the Republic of China.