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Full Moon and New Moon in December 2025: Dates, Sidereal Sign, Nakshatra
Computed major lunar phase timings for December 2025, using UTC as the canonical time source.
Moon calendar
Exact phase moments for writers and calendar readers
The table lists Full Moon, New Moon and quarter Moon events by exact UTC timestamp. The sign and nakshatra are the sidereal Moon position at the event moment, not a noon sample for the date.
Computed in UTC
Major Moon phases in December 2025
| Phase | UTC time | Your time | Moon sign | Nakshatra | Tithi |
|---|---|---|---|---|---|
| Full Moon 4 December 2025 | 4 Dec 2025, 23:14 UTC | Local time: browser timezone | Taurus | Rohini | Purnima, Shukla 15 |
| Last Quarter 11 December 2025 | 11 Dec 2025, 20:51 UTC | Local time: browser timezone | Leo | Purva Phalguni | Ashtami, Krishna 23 |
| New Moon 20 December 2025 | 20 Dec 2025, 01:43 UTC | Local time: browser timezone | Sagittarius | Mula | Amavasya, Krishna 30 |
| First Quarter 27 December 2025 | 27 Dec 2025, 19:09 UTC | Local time: browser timezone | Pisces | Uttara Bhadrapada | Ashtami, Shukla 8 |
How Vedara calculates Moon phases for December 2025
Vedara finds the exact major lunar phase moments from the geocentric Sun and Moon angle, then samples the Moon position at that timestamp. The sign and nakshatra are calculated in the sidereal zodiac with the Lahiri ayanamsha.
UTC is the canonical timestamp because a phase can fall on different local calendar dates around the world. The local-time column converts the same event moment in your browser, so the underlying calculation remains stable while the display adapts to your timezone.
Tithi is shown as a traditional lunar day at the same event moment. It is useful calendar context, not a personal instruction. Interpretation depends on a full birth chart and the question being asked.
Frequently asked questions
- When is the Full Moon in December 2025?
- The table on this page lists every major Moon phase in December 2025, including the Full Moon if one occurs in the month. Use the UTC timestamp as the source of truth, then read the local-time column for your browser timezone.
- Why can the local date differ from the UTC date?
- A lunar phase is a single global moment, but clocks divide that moment into local dates. An event near midnight UTC can appear on the previous or following date in another timezone. Vedara keeps UTC as the citation timestamp and converts the display locally.
- Why is the Moon sign sidereal here?
- Vedara uses the Lahiri sidereal zodiac for Vedic calculations. The astronomical Moon position is calculated first, then read against sidereal sign boundaries. A tropical calendar can label the same sky position differently because it uses a different zodiac reference.
- Does this month page interpret the Moon phases?
- Only lightly. The page gives computed dates, times, signs, nakshatras and tithi. Any meaning should be treated as general context, because the personal effect of a Full Moon or New Moon depends on where it falls in an individual birth chart.