Kalendar · astronomical clock

Kalendar is a circular astronomical clock: it shows at once the computed positions of the Sun and the Moon (NASA/JPL Horizons), the seasons, equinoxes and solstices, and several calendars.

• Gregorian calendar, Hijri calendar (Umm al-Qura) and the traditional Arabic month names, sacred months, ليالي البيض.
• Theoretical 13 × 28 calendar starting on 1 April and a luni-solar reconstruction with intercalation (historical hypothesis).
• Dial and Gantt views, toggleable layers, lunar farming tradition kept apart from scientific agronomy.
• Age of the Earth, the Sun and the Milky Way, and the Sun’s position in the Galaxy.
• Printable PDF poster, frozen on the year of your choice.

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