Xinhai Revolution (of China; 1911)
Water Boar (60th year of the sexagenary cycle, e.g. 1923, 1983, 2043)
Wood Boar (12th year of the sexagenary cycle, e.g. 1935, 1995, 2055)
Metal Boar (48th year of the sexagenary cycle, e.g. 1911, 1971, 2031)
Earth Boar (36th year of the sexagenary cycle, e.g. 1959, 2019, 2079)
Fire Boar (24th year of the sexagenary cycle, e.g. 1947, 2007, 2067)
tenth month of the lunar calendar
miswriting a word; using the wrong kanji to write a word