24 Solar Terms (Bazi)

The instant the sun reaches 315° of ecliptic longitude — the moment the BaZi year turns, and the only solar term that changes two pillars at once.

The instant the sun reaches 330° of ecliptic longitude — the midpoint of the 寅 month Beginning of Spring opened, moving no pillar.

The instant the sun reaches 345° of ecliptic longitude — the moment the month pillar's branch turns to 卯, opening spring's second month.

The instant the sun reaches 0° of ecliptic longitude — near-equal day and night worldwide, and a term that moves no pillar.

The instant the sun reaches 15° of ecliptic longitude — the moment the month pillar turns to 辰, distinct from the festival sharing its name.

The instant the sun reaches 30° of ecliptic longitude — the last mid-point term of spring, just before the calendar turns to summer.

The instant the sun reaches 45° of ecliptic longitude — the moment the month pillar's branch turns to 巳, and the calendar's turn to summer.

The instant the sun reaches 60° of ecliptic longitude — the midpoint of the 巳 month Beginning of Summer opened, moving no pillar.

The instant the sun reaches 75° of ecliptic longitude — the 節 that opens 午 in the month pillar at the height of summer.

The instant the sun reaches 90° of ecliptic longitude — the year's longest day, but a 氣 that moves nothing in a BaZi chart.

The instant the sun reaches 105° of ecliptic longitude — the 節 that opens 未 in the month pillar, at the start of the year's hottest stretch.

The instant the sun reaches 120° of ecliptic longitude — the year's hottest stretch by name, and a 氣 that changes no pillar.

The instant the sun reaches 135° of ecliptic longitude — the 節 that opens 申 in the month pillar and declares autumn.

The instant the sun reaches 150° of ecliptic longitude — the calendar's marker for the heat's retreat, and a 氣 that changes no pillar.

The instant the sun reaches 165° of ecliptic longitude — the 節 that opens 酉 in the month pillar as nights turn cool enough for dew.

The instant the sun reaches 180° of ecliptic longitude — day and night split evenly, but a 氣 that moves nothing in a BaZi chart.

The instant the sun reaches 195° of ecliptic longitude — the month-opening term that turns the pillar's branch to 戌.

The instant the sun reaches 210° of ecliptic longitude — the last mid-month term of autumn, and it moves no pillar.

The instant the sun reaches 225° of ecliptic longitude — the cross-quarter term that opens the 亥 month, well before the cold sets in.

The instant the sun reaches 240° — the 亥 month's midpoint, named for the north's first light snow, and it moves no pillar.

The instant the sun reaches 255° of ecliptic longitude — the term that actually opens the 子 month, two weeks before the winter solstice.

The instant the sun reaches 270° — the year's shortest day, and just the midpoint of a 子 month that opened two weeks earlier at Major Snow.

The instant the sun reaches 285° of ecliptic longitude — the term that opens the 丑 month, second-to-last stop before the year turns over.

The instant the sun reaches 300° — the last of the twenty-four terms, sitting at the 丑 month's midpoint, and it moves no pillar.