Almanac & sky · NUMORA
Dayun Calculator
Ten-year luck from the month pillar.
Open interactive calculatorHow to use
Start age is a sketch; forward/backward from year polarity and gender.
Formula
forward month+1; backward month−1; 10 years each
FAQ
Is this Dayun 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?
Start age is a sketch; forward/backward from year polarity and gender.
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