The traditional East Asian calendars divide a year into 24 solar terms. Xiǎohán, Shōkan, Sohan, or Tiểu hàn (Chinese and Japanese: 小寒; pinyin: xiǎohán; rōmaji: shōkan; Korean: 소한; romaja: sohan; Vietnamese: tiểu hàn; "minor cold") is the 23rd solar term. It begins when the Sun reaches the celestial longitude of 285° and ends when it reaches the longitude of 300°. It more often refers in particular to the day when the Sun is exactly at the celestial longitude of 285°. In the Gregorian calendar, it usually begins around 5 January and ends around 20 January.