Open dataset · CC BY-SA 4.0
Lunar calendar of Cheon Il Guk — ten canonical Holy Days, weekly Ahn Shil Il (day of rest), and ~50 providential observances of the Unification Movement.
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This is the open, machine-readable form of the Heavenly Calendar used by the Family Federation for World Peace and Unification. All dates are kept as lunar_md strings ("M.D" format), with two solar–lunar anchors for verification and a deterministic ahn_shil_il_rule for the weekly day of rest.
Use it: fetch ./lunar.json and feed it through any Korean lunar calendar library (e.g. korean-lunar-calendar, MIT). The dataset is CC BY-SA 4.0 — attribution required, share-alike for derivatives.