The day pillar for Saturday, 10 October 2026

Day pillar	丁巳 (ding si)
Heavenly stem	丁 (ding)
Earthly branch	巳 (si)
Day element	Fire 火 (huo)
Polarity	Yin
Month pillar	戊戌 (wu xu), governed by 寒露 (hanlu)

Today's day pillar is 丁巳 (ding si), a yin Fire day in the sixty-day cycle. The month pillar is 戊戌 (wu xu), governed by the term 寒露 (hanlu).

巳 (si), the sixth earthly branch

巳 is the snake branch, the start of summer and the late morning, fire that has not yet reached full heat.

巳 is Fire, yin by position, snake by animal. Its hours are 09:00 to 11:00 and its month begins at 立夏 (lixia) in early May.

Here the inside and the outside disagree in an instructive way. 巳 counts as yin by its place in the twelve, but the stem hidden at its core is 丙 (bing), which is yang Fire. Two more hide with it, 庚 (geng, yang Metal) and 戊 (wu, yang Earth). The tradition is comfortable with that, because position and content are simply two different readings.

A 巳 day is a snake day, and pairs such as 丁巳 (ding si), 己巳 (ji si) and 癸巳 (gui si) are how it appears in the sixty.