Moon calendar, December 2026
The phase for every night of December, computed from the same astronomy the Gibbous app uses. Tap any principal phase below for its exact instant.
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Phases shown for midday UTC each date; the disc you see tonight may differ slightly by hour and hemisphere. In the Southern Hemisphere the lit side appears mirrored.
| Phase | Instant (UTC) | Notes |
|---|---|---|
| Last quarter | December 1, 2026, 06:08 UTC | |
| New moon | December 9, 2026, 00:51 UTC | |
| First quarter | December 17, 2026, 05:42 UTC | |
| Full moon (Cold Moon) | December 24, 2026, 01:28 UTC | Supermoon |
| Last quarter | December 30, 2026, 18:59 UTC |
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