Calculate the 24 divisions of the solar year

The 24 divisions of the solar yearDateDay of week
小寒 (Shoukan) January 5Sun.
大寒 (Daikan) January 20Mon.
立春 (Risshun) February 3Mon.
雨水 (Usui) February 18Tues.
啓蟄 (Keichitsu) March 5Wed.
春分 (Shunbun) March 20Thurs.
清明 (Seimei) April 4Fri.
穀雨 (Kokuu) April 20Sun.
立夏 (Rikka) May 5Mon.
小満 (Shouman) May 21Wed.
芒種 (Boushu) June 5Thurs.
夏至 (Geshi) June 21Sat.
小暑 (Shousho) July 7Mon.
大暑 (Taisho) July 22Tues.
立秋 (Risshuu) August 7Thurs.
処暑 (Shosho) August 23Sat.
白露 (Hakuro) September 7Sun.
秋分 (Shuubun) September 23Tues.
寒露 (Kanro) October 8Wed.
霜降 (Soukou) October 23Thurs.
立冬 (Rittou) November 7Fri.
小雪 (Shousetsu) November 22Sat.
大雪 (Taisetsu) December 7Sun.
冬至 (Touji) December 22Mon.