Calendrier lunaire

Month grid with a small canvas disc for each day: the terminator is computed in 3D from the Sun and Moon RA/Dec directions at 12:00 UTC (orthographic view toward the Moon; illuminated fraction from the same ephemeris as elsewhere).

Use the arrows or the month picker to change month, or This month to jump back. The month picker uses your browser's native control (labels follow browser / OS locale).