Day Pillar (Ilju)
Your innate essence and nature from your day pillar (Ilju, the 60 sexagenary cycle) — the core of the Four Pillars, accurate even without your birth time.
Reads your innate essence — the core of the Four Pillars — and the inner nature of your day branch from your day pillar (60 sexagenary cycle). Treating the day pillar as the self is the method of Ziping astrology, set down by Xu Ziping in the Song dynasty; before that the year pillar held the centre. Ten heavenly stems pair with twelve earthly branches to make the sixty, advancing one per day from the day of Jiazi, so once the date of birth is fixed the day pillar is fixed with it. That is why this reading works without knowing your birth time.
How it works
Enter only your birth date and we draw your day pillar — the heavenly stem and earthly branch of the day you were born. It is fixed by the date alone, so you can read it even without knowing your birth hour.
What you'll get
You get the reading for your pillar among the sixty combinations, what your day branch says about your inner self, the texture of love, money, work, and health, and a link straight into your full chart. If you enter the hour you were born, one more section compares the day branch with the hour branch — how you are with others, and how you are alone.
Reading the stem and the branch separately
A day pillar is two characters, upper and lower, and each looks at something different. The heavenly stem above is the self that shows; the earthly branch below covers the inner self and the spouse position together. So a combination with an outgoing stem and a quiet branch reads as someone who steps forward outside yet goes quiet in front of those closest to them. Read the two apart and then lay them over each other, and it comes out much clearer.
How the sixty pillars turn
Ten stems and twelve branches pair up into sixty combinations, and the pillar moves on by one each day, so the same day pillar comes round every sixty days. That means people born under your day pillar arrive at a rate of about one day in sixty, which is a great many people once you count a whole country. Neither rare nor common, and holding it at roughly that weight also tells you how far a day pillar reading can reasonably speak.
The same pillar, three different others
Even with the same day pillar, a different year, month and hour pillar make the grain of the whole chart entirely different. What a day pillar reading catches is the central tendency; the strength of the elements, whether the chart runs strong or weak, and the flow of the luck cycles only appear once all eight characters are read. If a day pillar reading fits well and then misses somewhere, it is usually because the other three pillars are telling another story.
When you want to read compatibility from it
Because the day branch is the spouse position, many people try to read compatibility from day pillars alone. You can see whether the two stems generate or control each other and whether the branches combine or clash, but that is hard to call a full reading. The compatibility page weighs the animal signs and the balance of elements alongside the stems and branches, so that is the right place for a proper comparison. Do not settle a relationship on one pillar.
How to use a day pillar reading
The day pillar sits at the centre of a chart, which makes it a good light place to start, and it needs only a date rather than an hour. What you see here is not your whole chart, though, so if something catches at you, move on to the full reading and check. And either way, decisions like moving house, marrying or changing your name are not settled by a chart. The tradition sketches a grain; it does not fix an outcome.
Frequently Asked Questions
How is this different from a full Saju reading?
Saju reads all four pillars; the day pillar focuses on the one that stands for you. It is the lighter way in.
Do I need my birth time?
No. The day pillar is set by the date alone, so it reads fine even when the hour is unknown. Entering the hour gives you one more section to read; without it, only that section drops away and the rest reads as usual.
Is the day pillar alone worth reading?
In East Asian astrology the day pillar represents you, so it is the most central of the eight characters. It is not as detailed as a full chart, but it is the richest thread you can read without knowing your birth hour.
Can I enter a lunar birthday?
Yes. Choose lunar in the form and it is converted to the solar calendar first, then the day pillar is set from that date. Leap months are handled as they are.