Next Moon Day exists for a simple reason: if you practice in the Ashtanga yoga tradition, or you're just moon-curious, it's genuinely useful to know at a glance when the next full moon or new moon falls, and to have upcoming eclipses in the same place.
The site has two halves. One is practical — live moon phase, countdown to the next moon day, and a running list of upcoming solar and lunar eclipses with visibility notes. The other is explanatory — why certain yoga lineages pause asana practice on moon days, and what to do with that day instead: pranayama, meditation, journaling, or simply sitting outside under the moon.
We're not affiliated with any single studio, teacher, or lineage. The moon-day convention described here draws on the Ashtanga tradition associated with K. Pattabhi Jois and the Mysore method, but variations on lunar rest days show up across yogic, Vedic, and other contemplative traditions — we've tried to describe the common thread rather than any one authority's exact rule.
How the moon phase is calculated
The illuminated fraction and illustrated phase are estimates calculated in your browser from the Moon’s average 29.53-day synodic cycle. Exact new- and full-moon instants shown on the homepage and date calendars are taken from the U.S. Naval Observatory’s phase table in UTC, then converted to the time zone selected on the page. The default uses your browser’s time zone; no location access is requested.
Sources and support
U.S. Naval Observatory supplies the primary phase times. Eclipse types and broad visibility regions link to NASA eclipse information. This site may display ads and may use clearly identified affiliate links; a purchase through an affiliate link may earn a commission at no extra cost to you. You do not need an account or to share your location to use the date tools.