A solar term is any of twenty-four periods in traditional Chinese lunisolar calendars that matches a particular astronomical event or signifies some natural phenomenon. The points are spaced 15° apart along the ecliptic and are used by lunisolar calendars to stay synchronized with the seasons, which is crucial for agrarian societies. The solar terms are also used to calculate intercalary months; which month is repeated depends on the position of the sun at the time.

立春 315° Beginning of spring 4 February

雨水 330° Rain water 19 February

惊蛰 345° Waking of insects 6 March

春分 0° March equinox 21 March

清明 15° Pure brightness 5 April

谷雨 30° Grain rain 20 April

立夏 45° Beginning of summer 6 May

小满 60° Grain full 21 May

芒种 75° Grain in ear 6 June

夏至 90° June solstice 22 June

小暑 105° Slight heat 7 July

大暑 120° Great heat 23 July

立秋 135° Beginning of autumn 8 August

处署 150° Limit of heat 23 August

白露 165° White dew 8 September

秋分 180° September equinox 23 September

寒露 195° Cold dew 8 October

霜降 210° Descent of frost 24 October

立冬 225° Beginning of winter 8 November

小雪 240° Slight snow 22 November

大雪 255° Great snow 7 December

冬至 270° December solstice 22 December

小寒 285° Slight cold 6 January

大寒 300° Great cold 20 January