LunaBest days of the month
- excellent day: 1, 2, 26, 27, 28, 29
- good: 3, 4, 10, 11, 12, 20, 21, 30, 31
- tradition advises against: 15, 16, 17, 25
The date of a lunation depends on where you stand
Every time in this table is computed in UTC, because a single reference is the only way to keep twelve months of arithmetic consistent with each other. Three of the twelve full moons in this calendar fall within ninety minutes of midnight UTC - 24 December at 01:28, 19 June at 00:44 and 20 February at 23:23 - and each of them shifts by a date across part of the world. The new moons do the same, with 9 December landing at 00:51 UTC. Where the tradition matters to you and the hour is that close, the practical answer is to treat both dates as blocked rather than to argue with the clock. Away from those edges the arithmetic is unambiguous, and December's favoured dates - the 1st, the 2nd and the 26th to the 29th - sit nowhere near a lunation.
Days of December 2026
| Date | Moon sign | Phase | Tradition’s verdict |
|---|---|---|---|
| Tue, Dec 1 | Virgo | last quarter (waning) | ✂ excellent day |
| Wed, Dec 2 | Virgo | last quarter (waning) | ✂ excellent day |
| Thu, Dec 3 | Libra | waning crescent | good |
| Fri, Dec 4 | Libra | waning crescent | good |
| Sat, Dec 5 | Scorpio | waning crescent | ordinary |
| Sun, Dec 6 | Scorpio | waning crescent | ordinary |
| Mon, Dec 7 | Scorpio | waning crescent | ordinary |
| Tue, Dec 8 | Sagittarius | waning crescent | ordinary |
| Wed, Dec 9 | Sagittarius | new moon | new/full moon - skip |
| Thu, Dec 10 | Capricorn | waxing crescent | good |
| Fri, Dec 11 | Capricorn | waxing crescent | good |
| Sat, Dec 12 | Capricorn | waxing crescent | good |
| Sun, Dec 13 | Aquarius | waxing crescent | ordinary |
| Mon, Dec 14 | Aquarius | waxing crescent | ordinary |
| Tue, Dec 15 | Pisces | first quarter (waxing) | tradition advises against |
| Wed, Dec 16 | Pisces | first quarter (waxing) | tradition advises against |
| Thu, Dec 17 | Pisces | first quarter (waxing) | tradition advises against |
| Fri, Dec 18 | Aries | first quarter (waxing) | ordinary |
| Sat, Dec 19 | Aries | waxing gibbous | ordinary |
| Sun, Dec 20 | Taurus | waxing gibbous | good |
| Mon, Dec 21 | Taurus | waxing gibbous | good |
| Tue, Dec 22 | Gemini | waxing gibbous | ordinary |
| Wed, Dec 23 | Gemini | waxing gibbous | ordinary |
| Thu, Dec 24 | Cancer | full moon | new/full moon - skip |
| Fri, Dec 25 | Cancer | waning gibbous | tradition advises against |
| Sat, Dec 26 | Leo | waning gibbous | ✂ excellent day |
| Sun, Dec 27 | Leo | waning gibbous | ✂ excellent day |
| Mon, Dec 28 | Virgo | waning gibbous | ✂ excellent day |
| Tue, Dec 29 | Virgo | last quarter (waning) | ✂ excellent day |
| Wed, Dec 30 | Libra | last quarter (waning) | good |
| Thu, Dec 31 | Libra | last quarter (waning) | good |
This is folklore, not dermatology: the Moon’s position on this page is computed with Swiss Ephemeris, no research links the phase to hair growth, and a haircut on an “unfavourable” day harms nothing. How the rules work.
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