March 31 zodiac sign

On March 31 the Sun stands between 9° and 11° Aries, in the 2nd decan of the sign.

Across all the years 1930 to 2050, the Sun was in Aries for the whole of March 31, wherever in the world you were born.

Find your exact Sun degree

Add your birth year, and your time and place if you know them. Hali will work out exactly where the Sun stood when you arrived, and when it next returns there.

Your birthday star

The stars truly behind your Sun

On March 31 the Sun stands in front of the stars of Pisces, the fishes, even though the sign is Aries. Astrologers' signs follow the seasons, and over two thousand years the seasons have slipped about a whole sign against the stars.

See the real sky behind your whole chart

March 31 in every year from 1940 to 2025

The Sun is in Aries on March 31, but the Moon, Mercury and Venus keep moving. Open your decade to see where they were on your birthday. Times are Greenwich time (UTC), so if the Moon changed sign that day, your birth time and place decide which side of the line you were born on.

Moon at midnight and the minute it changed sign, Mercury and Venus at noon, all Greenwich time. Your exact placements need your birth time and place. Find your exact Moon sign

How common is a March 31 birthday?

In US birth records from 1994 to 2014, an average of 10,779 babies were born on March 31 each year. That makes it number 313 of 366 birthdays, where 1 is the most common. That is 3% fewer than an average day.

See every birthday and sign ranked

More from our studies: The rarest rising sign, city by city · How rare is your Big Three? · Were you born with Mercury retrograde?

The Aries in you

Your decan, the second part of Aries

Ruled by the Sun

Here the Sun lends Aries its warmth and a love of the spotlight. Your courage wants an audience, and a cause worth being brave for.

Read about the second decan of Aries

Questions about March 31