The day pillar for Wednesday, 20 January 2027

Day pillar	己亥 (ji hai)
Heavenly stem	己 (ji)
Earthly branch	亥 (hai)
Day element	Earth 土 (tu)
Polarity	Yin
Solar term	大寒 (dahan)
Month pillar	辛丑 (xin chou), governed by 小寒 (xiaohan)

Today's day pillar is 己亥 (ji hai), a yin Earth day in the sixty-day cycle. Today is also the solar term 大寒 (dahan), one of the twenty-four stations of the solar year. The month pillar is 辛丑 (xin chou), governed by the term 小寒 (xiaohan).

大寒 (dahan), major cold

大寒 is the last of the twenty-four solar terms, the deepest cold, and the fortnight before the year begins again.

It falls around the twentieth of January and closes the circle that started at 立春 (lichun) almost a year earlier. The next term after it is 立春 again, which is why the twenty-four are usually drawn as a ring rather than a list.

大寒 is a medial term inside the 丑 (chou) month. Nothing changes with it; the change comes at 立春, when the year pillar, the month pillar and the whole count move together.

If the page shows 大寒 as the governing term, anyone born in these days still belongs to the outgoing BaZi year, whatever the wall calendar and the coming new year celebrations suggest.