Live lunar tracking paired with the 13 month calendar. Today's phase, the next new moon and full moon, and the coming waxing and waning windows — every Gregorian date below is paired with its 13 month calendar equivalent. See also is the 13 month calendar lunar?, the Sol month, and the 13 month calendar date converter.
Next New Moon
June 14, 2026
June 25 · 13-month
in 1 day
Next Full Moon
June 29, 2026
Sol 12 · 13-month
in 16 days
Next Waxing Window
June 14 – June 22, 2026
June 25 – Sol 5 · 13-month
starts in 1 day
Next Waning Window
June 29 – July 6, 2026
Sol 12 – Sol 19 · 13-month
starts in 16 days
Tonight: Waning Crescent · 7% illuminated · June 13, 2026 (June 24 · 13-month)
The full lunar synodic cycle takes about 29.5 days from one new moon to the next, passing through eight recognizable phases along the way.
Next New Moon: June 14, 2026 (June 25 · 13-month) — in 1 day.
The new moon marks the start of a fresh lunar cycle, when the moon sits between Earth and the sun and its illuminated face is turned away from us.
Next Full Moon: June 29, 2026 (Sol 12 · 13-month) — in 16 days.
The full moon falls roughly halfway through the cycle, when Earth sits between the sun and the moon and the entire near side is lit.
Next Waxing Window: June 14 – June 22, 2026 (June 25 – Sol 5 · 13-month) — starts in 1 day.
The waxing window runs from new moon to first quarter — a time of building light, traditionally associated with growth, planning, and gathering energy for what comes next.
Next Waning Window: June 29 – July 6, 2026 (Sol 12 – Sol 19 · 13-month) — starts in 16 days.
The waning window runs from full moon to last quarter — a time of releasing light, traditionally associated with rest, reflection, and letting go.
Every lunar cycle moves through eight named phases. Four are major: new moon, first quarter, full moon, and last quarter. Between them sit four intermediate phases: waxing crescent, waxing gibbous, waning gibbous, and waning crescent. "Waxing" means the lit portion is growing; "waning" means it is shrinking. "Crescent" describes a sliver less than half-lit; "gibbous" describes a shape more than half-lit but not yet full.
The whole sequence repeats every 29.530588 days on average — what astronomers call the synodic month. This is the cycle that almost every lunar tradition, from agricultural folk calendars to fasting protocols, has followed for thousands of years.
The 13-month fixed calendar uses months of exactly 28 days — a clean four-week block. The actual moon cycle is closer to 29.5 days, so the two don't lock perfectly: the moon drifts about 1.5 days later inside each fixed month. But the structural similarity is striking. A 28-day month gives you a stable, repeatable container that roughly tracks the moon, without trying to chase it the way a true lunar calendar (like the Islamic Hijri calendar) does.
If you want the rational, perpetual structure of a 13-month year and a tighter relationship with actual moon phases, you can use this tracker as the live overlay: the fixed calendar gives you the grid, and the moon phase data gives you the rhythm.
Read more about how the 13-month calendar relates to the moon, and try a moon-aligned protocol for yourself.