Solar Events Calculator

Solar events from to   (enter four-digit years) — calculate

Use locale settings:     (support varies)
(doesn’t work for all locales)

Equinoxes are in March and September, solstices are in June and December (Vernal Equinox, Summer Solstice, Autumnal Equinox, Winter Solstice);
the others are cross-quarter days (Imbolc, Beltane, Lughnasadh, Samhain).

Times are given in Coordinated Universal Time, and local time using your system’s time zone and daylight saving time settings.

Calculations are based on the “higher accuracy” equations in Astronomical Algorithms, second edition, by Jean Meeus, and the full VSOP87 data set.

Please visit | blog