Born on December 31: Zodiac Sign & Birthstone

Anyone born on December 31 is a Capricorn. The December 31 birthstone is Turquoise and the December 31 birth flower is the Narcissus.

What it means to be born on December 31

A birthday on the 31st of December falls under Capricorn. Capricorn is a cardinal earth sign ruled by Saturn, associated in tradition with ambition, discipline and the long climb toward a goal. The sea-goat, part mountain climber and part deep-sea creature, is its unusual emblem. Its season opens the year.

What weekday December 31 falls on

A common year is 365 days, which is 52 weeks plus one day, so a birthday moves forward one weekday each year and two across a leap year. Over time it visits all seven. The next time December 31 falls at a weekend is 2028, on a Sunday.

The weekday December 31 falls on over the next ten years.
Year	Weekday	Weekend?
2026	Thursday	no
2027	Friday	no
2028	Sunday	yes
2029	Monday	no
2030	Tuesday	no
2031	Wednesday	no
2032	Friday	no
2033	Saturday	yes
2034	Sunday	yes
2035	Monday	no

Your December 31 birthstone and flower

Because December 31 sits in December, your birthstone is Turquoise, a sky blue to teal gem traditionally meaning protection, friendship and good fortune. Your birth flower is the Narcissus, which stands for hope, respect and good wishes. Together they make a natural birthday pairing for a card, gift or tattoo.

Every tradition tied to December 31

Everything the calendar assigns to December 31, in one table.
Field	Value
Zodiac sign	Capricorn (December 22 to January 19)
Element and modality	Cardinal Earth
Ruling planet	Saturn
Lucky colors	Brown and Charcoal
Modern birthstone	Turquoise, sky blue to teal
Other recognized stones	Tanzanite (violet blue), Zircon (blue to colorless), Blue Topaz (pale to sky blue)
Birth flower	Narcissus, with Holly as secondary
Day of the year	366 of 366 and 365 of 365
On a sign boundary	no

Capricorn strengths and matches

Capricorn is often described as disciplined, responsible and ambitious. In the traditional element model, Capricorn matches most easily with Taurus, Virgo and Scorpio. Those percentages come from a published formula you can check on the method page, not from a reading.

See the full birth profile

Want the shareable card for December 31? Open the birth profile tool, pick this date, and download a card to save or share. You can also read the full December overview, or browse every date we cover.

Frequently asked questions

What zodiac sign is December 31?

Anyone born on December 31 is a Capricorn, a cardinal earth sign ruled by Saturn.

What is the birthstone for December 31?

The birthstone for December 31 is Turquoise, the December birthstone, which is sky blue to teal. December also recognizes Tanzanite, Zircon and Blue Topaz.

What is the birth flower for December 31?

The birth flower for December 31 is the Narcissus, the December birth flower, with the Holly as a secondary flower.

What day of the week does December 31 fall on?

In 2026 it falls on a Thursday. Because a common year is 365 days, the weekday moves on by one each year and by two across a leap year, so it cycles through all seven over time. The table on this page lists the next ten years.

Where does December 31 fall in the year?

December 31 is day 366 of a leap year and day 365 of a common year.

Born on December 31