Calculating…
☽ Lunar Calendar
Live lunar phase with illumination and monthly calendar. New and full moon dates calculated with Swiss Ephemeris to ±1 minute accuracy.
Illumination comes from the Sun–Moon elongation angle: (1 − cos θ) / 2 × 100%. At New Moon (0°) illumination is 0%; at Full Moon (180°) it is 100%.
No. Moon phase is the angular gap between the Sun and Moon — identical in both systems. The ~24° Lahiri ayanamsa offset shifts the Moon's zodiac sign but not its phase angle.
Dates are calculated with Swiss Ephemeris using the Moshier analytical ephemeris, accurate to ±0.01°. The event time is narrowed by binary search to within ±1 minute.