The Archer · November 22 – December 21
December 1 Zodiac Sign
Born on December 1, you're a Sagittarius — the zodiac's explorer — optimistic, honest and always aiming for the horizon.
Zodiac sign
Element · Modality
Fire · Mutable
Decan (first)
Mercury-ruled
Birthstone
Turquoise
Birth flower
Narcissus
Season position
Day 10 of 30
What astrology says about a December 1 birthday
December 1 is day 10 of Sagittarius season, so astrologers link it with the sign's core character: adventurous, optimistic, philosophical, honest. Traits astrologers commonly associate with Sagittarius include boundless optimism and a great sense of humour; curious, open-minded and eager to learn; honest and straightforward.
A commonly cited growth area for Sagittarius: over-promising out of enthusiasm. For the full picture of the sign, read the Sagittarius guide.
1st decan of Sagittarius: Mercury
Each sign is divided into three decans, 10° slices that the Sun crosses in about ten days each. December 1 falls in the first decan of Sagittarius (about November 22 – December 1), which the traditional Chaldean system assigns to Mercury. Astrologers say that adds curiosity, quick thinking and verbal agility.
Mercury sharpens the mind here — expect a restless curiosity, a love of talking things through and a knack for picking up new skills fast.
The number 1 in numerology
The 1 is the number of beginnings. Numerologists link a 1st-of-the-month birthday to independence, initiative and a preference for doing things your own way.
Numerology is a separate tradition from astrology and is offered here for interest.
December birthstone and flower
The modern birthstone for December is Turquoise and the commonly listed birth flower is the narcissus. December falls in the month of the December solstice — winter in the northern hemisphere and summer in the southern.
Sagittarius love and compatibility
Sagittarius wants a partner who is also a travel companion — in the literal and intellectual sense. Shared adventures, big conversations and plenty of laughter matter more to them than routine romance.
Astrology is a symbolic tradition, not a science, and interpretations vary between astrologers. This page is for reflection and entertainment, not prediction or advice.
Beyond your December 1 Sun sign
Your Sagittarius Sun is one planet. Your Moon, Rising sign and the exact Mercury-ruled decan details live in your full natal chart. Get yours free on Skygram.
Get my free birth chartDecember 1 birthday FAQ
What zodiac sign is December 1?
December 1 falls in Sagittarius, which runs from November 22 to December 21 in the tropical zodiac. The Sun changes sign at a slightly different moment each year, so the boundary can fall a day or so either side of these dates. If you were born close to the edge, your birth year, time and place decide it.
Is December 1 a cusp birthday?
Not by the usual definition, which counts the first and last couple of days of a sign. December 1 is day 10 of Sagittarius season, so it is normally read as a clear Sagittarius birthday.
Which decan is December 1?
December 1 is in the first decan of Sagittarius (November 22 – December 1). In the traditional Chaldean system this decan is ruled by Mercury, which astrologers say adds its own flavour to Sagittarius. Some modern astrologers assign decan rulers by element instead, which gives different planets, and decans are strictly 10° slices of the zodiac, so the date range is approximate.
What are the birthstone and flower for December?
The modern birthstone for December is Turquoise and the birth flower is the narcissus. These come from calendar tradition rather than astrology, and the lists vary by country and source.