Born on October 31: Zodiac Sign & Birthstone

Anyone born on October 31 is a Scorpio. The October 31 birthstone is Opal and the October 31 birth flower is the Marigold.

What it means to be born on October 31

A birthday on the 31st of October falls under Scorpio. Scorpio is a fixed water sign, ruled by Pluto in modern astrology and by Mars in the older tradition. It is associated with intensity, depth and transformation. The scorpion is its emblem. Scorpio season sits in mid-autumn.

What weekday October 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 October 31 falls at a weekend is 2027, on a Sunday.

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

Your October 31 birthstone and flower

Because October 31 sits in October, your birthstone is Opal, a iridescent play-of-color gem traditionally meaning creativity, hope and imagination. Your birth flower is the Marigold, which stands for warmth, creativity and devotion. Together they make a natural birthday pairing for a card, gift or tattoo.

Every tradition tied to October 31

Everything the calendar assigns to October 31, in one table.
Field	Value
Zodiac sign	Scorpio (October 23 to November 21)
Element and modality	Fixed Water
Ruling planet	Pluto (traditionally Mars)
Lucky colors	Deep red and Black
Modern birthstone	Opal, iridescent play-of-color
Other recognized stones	Tourmaline (widest color range of any gem)
Birth flower	Marigold, with Cosmos as secondary
Day of the year	305 of 366 and 304 of 365
On a sign boundary	no

Scorpio strengths and matches

Scorpio is often described as passionate, determined and loyal. In the traditional element model, Scorpio matches most easily with Cancer, Pisces and Virgo. 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 October 31? Open the birth profile tool, pick this date, and download a card to save or share. You can also read the full October overview, or browse every date we cover.

Frequently asked questions

What zodiac sign is October 31?

Anyone born on October 31 is a Scorpio, a fixed water sign ruled by Pluto (traditionally Mars).

What is the birthstone for October 31?

The birthstone for October 31 is Opal, the October birthstone, which is iridescent play-of-color. October also recognizes Tourmaline.

What is the birth flower for October 31?

The birth flower for October 31 is the Marigold, the October birth flower, with the Cosmos as a secondary flower.

What day of the week does October 31 fall on?

In 2026 it falls on a Saturday. 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 October 31 fall in the year?

October 31 is day 305 of a leap year and day 304 of a common year.

Born on October 31