Chinese zodiac day sign & Day Master
Every day has its own animal and heavenly stem. In Four Pillars astrology the stem of your birth day — the Day Master — represents you yourself.
Result
Example — enter your own details and press Calculate.
Day Master: Yang Water (Ren)
- Date
- Friday, 25 Sep 2026
- Day Master element
- Water
The 60-day cycle
Days are counted in an unbroken cycle of 60 stem–branch pairs that has run for over two thousand years, independent of months and years. 1 January 2000 was Wu Wu (戊午), a Yang Earth Horse day; the next day is Ji Wei, and so on.
Traditional almanacs use the day animal to choose dates: a day whose animal clashes with your year animal is usually avoided for important events. The clash calculator tells you which animal that is.
Use it in your app
This calculator is the GET /api/v2/zodiac/day endpoint of the Feng Shui API. Get a free key, then:
curl -H "X-API-Key: $FENGSHUI_API_KEY" \ "https://fengshui-api.com/api/v2/zodiac/day?date=2026-09-25"
Full reference in the API docs; ready-to-run programs in 8 languages on the code examples page.
Frequently asked questions
When does the day change?
At midnight of the civil date. Some schools start the day at 23:00 with the Rat hour; this calculator uses the civil date.
Is this calculator free?
Yes. The web calculator needs no account. For automated use, create a free account to get an API key.
Related calculators
Chinese zodiac year sign
Your year animal, element and year pillar, with the exact start and end of the Chinese year.
Chinese zodiac month sign
The lunar or solar month of a date, its animal and month pillar.
Chinese zodiac hour sign
Which of the twelve animals rules the two-hour period of your birth.
Astrological allies
The two animals of your trine who share your energy.