Almanac & sky · NUMORA
Time Hexagram Calculator
Year branch, month, day, hour modulo → hexagram. Plum-blossom time, its own page.
Open interactive calculatorHow to use
Upper (y+m+d) mod 8, lower adds the hour, moving line is the total mod 6.
Formula
upper=(branch+m+d)%8; lower+=hour; moving=total%6
FAQ
Is this Time Hexagram calculator accurate?
The formula and assumptions are shown on the page, and the engine is covered by audit tests. Results are for reference — not financial or medical advice.
Do I need an account?
No. Calculations run in your browser. Recents can stay on this device.
What inputs do I need?
Upper (y+m+d) mod 8, lower adds the hour, moving line is the total mod 6.
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