Almanac & sky · NUMORA

Planet Ingress Calculator

You remember one calendar and need the other — for a wedding, a grave, or a hukou.

Open interactive calculator

How to use

Root-find the 30° boundary.

Formula

λ(t) = 30°·k

FAQ

Is this Planet Ingress 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?

Root-find the 30° boundary.

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