Korea has read the heavens in a person for six hundred years. FourWeeks paints yours — and reads it to you, every day.
You are born once — into an exact sky.
Five elements, each in its yin and its yang.
That weather never leaves you. We read it.
A birth chart in the Western sense maps where the planets sat. Saju does something more personal: it takes the exact year, month, day, and hour of your birth — and the exact place, because the sun’s real position there bends your hour — and reads which of the five elements were moving, and in what private proportion no one else shares.
Rich in its own right — and most people still only ever hear their sun sign.
Wood, Fire, Earth, Metal, Water — each in two forms — weighed in a balance that is yours alone, down to the hour and the city.
This is the real heart of Saju: not five things, but ten. Yang Fire is the sun; Yin Fire is a single candle in the dark. Same element, two temperaments. The day you were born makes one of these ten your core — your Day Master.
These ten are the Heavenly Stems — the true “types” of Saju. Where your sun sign is one of twelve, your Day Master is one of these ten, and the rest of your chart colors it further.
Your Day Master is the element of the day you were born — the single character that means “me.” Everything else in the chart is named by how it leans toward or against it: what feeds you, what drains you, what you control, what controls you, who’s your equal.
That’s why it never gets a label of its own — it is the label everything else is measured against.
The Ten Gods aren’t traits you simply “are.” Each one names a relationship between you (your Day Master) and another force in your chart — your money, your work, your rivals, your mentors. Born into your chart, they also rise and fall as time moves — a year can light one up. We give each a clear name; the traditional Korean term sits just beneath it.
Beyond the fixed chart, you walk through one element every decade — your Great Luck (대운). It’s the part no sun sign can give you: where you are now, what season is rising next, when the weather turns. Here’s a life, drawn in ten-year chapters.
This is the simplest read. With deeper lenses you can break a single decade down year by year and month by month — turning points, and the windows that favor a move. More ways to read it →
Each morning, today’s energy meets your pillars and becomes a single, specific line — drawn from your chart, not a horoscope written once for everyone born under a sign. The kind that occasionally reads you a little too closely.
Today’s Earth supports your Metal — the day brings help if you let it: an answer, a mentor, a rest you’ve been putting off. You carry a lot. Let something carry you back.
Masters read the same eight characters through different lenses. We give you the most widely-used one free — and the others are how you go deeper.
Find what your chart is short on and what it leans on. The everyday reading most people start with.
The archetype your pillars form — the “type” of life the chart is built around.
See it in the app →Reads you through the season you were born into — heat and cold, wet and dry — and what restores balance.
See it in the app →