--- title: "December Birthdays: Zodiac Signs, Decans and Numerology for Every Day" description: "December birthdays: zodiac signs and decans for every day of December, cusp dates, the month's numerology and its Chinese zodiac boundary." canonical: https://unifiedreading.com/birthday/december last-updated: 2026-10-23 reviewed: false author: Unified Reading editorial --- # December Birthdays: Zodiac Signs, Decans and Numerology for Every Day In Western astrology, December birthdays fall under Sagittarius and Capricorn. In most years December birthdays from the 1st to the 21st are Sagittarius, and from the 22nd they are Capricorn. December 20, December 21, December 22 and December 23 are cusp dates. In numerology December is month 12, which reduces to 3. ## Key facts | Fact | Value | | --- | --- | | Sun signs (most years) | Sagittarius Dec 1–21 · Capricorn Dec 22–31 | | Cusp dates | Dec 20, Dec 21, Dec 22, Dec 23 | | Month number | 12 → 3 | | Days | 31 | | Chinese zodiac | The birth year's own animal (Lunar New Year has passed) | ## Zodiac signs and decans in December December opens on the final day of Sagittarius' first decan, where Jupiter is doubled, and moves on December 2 into the second, where Mars as sub-ruler gives the Archer extra drive and daring. Around December 12 the third decan begins, and the Sun lends Sagittarius warmth and a flair for inspiring others. Then, around December 21 or 22, at the solstice, the Sun enters Capricorn. The shift from mutable fire to cardinal earth is one of the clearest of the year: from wandering to climbing, from big ideas to the plan that makes them real. The last days of December sit in Capricorn's first decan, where Saturn rules twice. December birthdays often hold both moods, the free spirit and the steady builder, and the year's end gives them a natural reason to weigh one against the other. In most years December birthdays from the 1st to the 21st are Sagittarius, and from the 22nd they are Capricorn. The cusp dates, where the sign can differ by year or time zone, are December 20, 21, 22 and 23; each has its own page explaining both possibilities. Decan by decan, the month opens in the first decan of Sagittarius, linked with Jupiter, from the 2nd the second decan of Sagittarius, linked with Mars, from the 12th the third decan of Sagittarius, linked with Sun and from the 22nd the first decan of Capricorn, linked with Saturn. ## December birthdays in numerology and the Chinese zodiac December is month 12, which numerology reduces to 1 + 2 = 3, the number of creativity, communication and joy. The compound is often read as a story in itself: the 1 of the individual and the 2 of partnership combining into expression. That makes the month's numerology feel social and warm, well suited to the season. December birthdays follow the calendar year's Chinese animal. Under Four Pillars reckoning the Rat month starts around December 7 with the solar term Major Snow, so most December birthdays carry the Rat in the month pillar. The Rat is traditionally associated with quick wits, resourcefulness and a keen eye for opportunity. Next to Sagittarius' optimism and Capricorn's ambition, it suggests someone who notices the opening and moves first. Every page for a December date lists the Life Path for several birth years, because the year changes the total even when the day stays the same. ## Famous December birthdays Each December page lists the best-known people born on that date, drawn from Wikidata and ranked by how many Wikipedia language editions have an article about them. A sample across the month: Pablo Escobar (December 1), Rainer Maria Rilke (December 4), Noam Chomsky (December 7), Emily Dickinson (December 10), Taylor Swift (December 13), Jane Austen (December 16), Édith Piaf (December 19), Basshunter (December 22), Justin Trudeau (December 25), Woodrow Wilson (December 28) and Henri Matisse (December 31). Sharing a birthday with someone well known says nothing about a life's direction, but it is a pleasant way into the date's sign, decan and numbers, which each page then explains in turn. The lists favour people with a precisely recorded birth date in the modern Gregorian calendar, so some much-celebrated figures from earlier centuries are missing. ## Every December birthday - [December 1](https://unifiedreading.com/birthday/december-1) - [December 2](https://unifiedreading.com/birthday/december-2) - [December 3](https://unifiedreading.com/birthday/december-3) - [December 4](https://unifiedreading.com/birthday/december-4) - [December 5](https://unifiedreading.com/birthday/december-5) - [December 6](https://unifiedreading.com/birthday/december-6) - [December 7](https://unifiedreading.com/birthday/december-7) - [December 8](https://unifiedreading.com/birthday/december-8) - [December 9](https://unifiedreading.com/birthday/december-9) - [December 10](https://unifiedreading.com/birthday/december-10) - [December 11](https://unifiedreading.com/birthday/december-11) - [December 12](https://unifiedreading.com/birthday/december-12) - [December 13](https://unifiedreading.com/birthday/december-13) - [December 14](https://unifiedreading.com/birthday/december-14) - [December 15](https://unifiedreading.com/birthday/december-15) - [December 16](https://unifiedreading.com/birthday/december-16) - [December 17](https://unifiedreading.com/birthday/december-17) - [December 18](https://unifiedreading.com/birthday/december-18) - [December 19](https://unifiedreading.com/birthday/december-19) - [December 20](https://unifiedreading.com/birthday/december-20) - [December 21](https://unifiedreading.com/birthday/december-21) - [December 22](https://unifiedreading.com/birthday/december-22) - [December 23](https://unifiedreading.com/birthday/december-23) - [December 24](https://unifiedreading.com/birthday/december-24) - [December 25](https://unifiedreading.com/birthday/december-25) - [December 26](https://unifiedreading.com/birthday/december-26) - [December 27](https://unifiedreading.com/birthday/december-27) - [December 28](https://unifiedreading.com/birthday/december-28) - [December 29](https://unifiedreading.com/birthday/december-29) - [December 30](https://unifiedreading.com/birthday/december-30) - [December 31](https://unifiedreading.com/birthday/december-31) ## Frequently asked questions ### What zodiac signs are December birthdays? In most years December birthdays from the 1st to the 21st are Sagittarius, and from the 22nd they are Capricorn. The cusp dates, where the sign can differ by year or time zone, are December 20, 21, 22 and 23; each has its own page explaining both possibilities. ### What is the numerology number of December? December is month 12, which reduces to 3. The month is one of three parts of the Life Path calculation, with the day and the year. ### Which Chinese zodiac animal is someone born in December? Lunar New Year has always passed by December, so a December birth takes the animal of the calendar birth year. ## Related pages - [Birthdays](https://unifiedreading.com/birthday) - [November birthdays](https://unifiedreading.com/birthday/november) - [January birthdays](https://unifiedreading.com/birthday/january) - [December 1](https://unifiedreading.com/birthday/december-1) - [December 15](https://unifiedreading.com/birthday/december-15) - [Life Path calculator](https://unifiedreading.com/life-path-calculator) - [Zodiac sign calculator](https://unifiedreading.com/zodiac-sign-calculator) - [Chinese zodiac calculator](https://unifiedreading.com/chinese-zodiac-calculator) - [Name numerology calculator](https://unifiedreading.com/name-numerology-calculator) - [Birthday compatibility calculator](https://unifiedreading.com/birthday-compatibility-calculator) - [Birth chart calculator](https://unifiedreading.com/birth-chart-calculator) - [Zodiac signs](https://unifiedreading.com/zodiac) ## About Unified Reading Unified Reading combines Pythagorean numerology, the Western Sun sign (Moon and rising with a birth time), the Chinese zodiac and life-stage context in one reading. The preview is free at https://unifiedreading.com/#details; the full reading is $4.99, paid once through Stripe, with no subscription. A fictional sample is at https://unifiedreading.com/sample. With a birth time and place it adds whole sign houses and the chart ruler; it does not calculate planetary aspects or transits, and it is a framework for reflection, not a prediction.