Four Pillars of Destiny

Your birth moment, written in eight characters

Year, month, day and hour each become a pillar of one Heavenly Stem and one Earthly Branch. We calculate them in code — with your birthplace's true solar time and the exact Start of Spring — and AI only writes the words.

What we calculate

True solar time from your birthplace's longitude and the equation of time.
Year and month by the exact solar terms — the Start of Spring (立春), not 1 January.
Ten Gods, hidden stems, Na Yin, the twelve life stages and branch interactions.
Luck Pillars from the minute-precise distance to the nearest solar term.

Your birth details

Nickname (optional)

Only shown to you. Leave blank if you like.

Date of birth

Time of birth

I don't know the time

Place of birth

We use the city’s time zone and longitude to work out your true solar time.

Gender

FemaleMalePrefer not to say

Traditionally used only to set the direction of the Luck Pillars.

We store only what's needed to show your chart.