Astronomy-based calendar prototype
Galactic Seasons
Explore the real constellation positions of the Sun and Moon, alongside tropical Western and Chinese lunisolar calendars.
Explore a birth moment
Used only when clocks fall back and a local time occurs twice.
Generate the JSON files first, then serve this folder locally.
Explore the constellations returned by the Galactic calendar. The star artwork is decorative; astronomical classification comes from the IAU boundary dataset.
Transitions for the selected birth year will appear after exploring a moment.