May birthdays

May 21 zodiac sign

By Maren Tremblay, Fatesight editor · Last updated October 30, 2026

May 21 is either Gemini or Taurus, depending on the year and the hour: Gemini in 44 of the 61 years from 1950 to 2010 and Taurus in 17. Put another way, at noon UTC on this date from 1950 to 2010, the Sun stood between 29°37' Taurus and 0°48' Gemini, with the constellation Taurus behind it.

The years the Sun changed sign on May 21

The Sun moved from one sign to the next on this date in 48 of the 61 years. If you were born on one of these days, your birth time decides your sign: 1950 at 15:27 UTC, into Gemini, 1951 at 21:15 UTC, into Gemini, 1952 at 03:03 UTC, into Gemini, 1953 at 08:52 UTC, into Gemini, 1954 at 14:47 UTC, into Gemini, 1955 at 20:24 UTC, into Gemini, 1956 at 02:12 UTC, into Gemini, 1957 at 08:10 UTC, into Gemini, 1958 at 13:51 UTC, into Gemini, 1959 at 19:41 UTC, into Gemini, 1960 at 01:33 UTC, into Gemini, 1961 at 07:22 UTC, into Gemini, 1962 at 13:16 UTC, into Gemini, 1963 at 18:57 UTC, into Gemini, 1964 at 00:49 UTC, into Gemini, 1965 at 06:50 UTC, into Gemini, 1966 at 12:31 UTC, into Gemini, 1967 at 18:18 UTC, into Gemini, 1968 at 00:05 UTC, into Gemini, 1969 at 05:49 UTC, into Gemini, 1970 at 11:37 UTC, into Gemini, 1971 at 17:14 UTC, into Gemini, 1973 at 04:54 UTC, into Gemini, 1974 at 10:35 UTC, into Gemini, 1975 at 16:23 UTC, into Gemini, 1977 at 04:14 UTC, into Gemini, 1978 at 10:08 UTC, into Gemini, 1979 at 15:53 UTC, into Gemini, 1981 at 03:39 UTC, into Gemini, 1982 at 09:22 UTC, into Gemini, 1983 at 15:06 UTC, into Gemini, 1985 at 02:42 UTC, into Gemini, 1986 at 08:27 UTC, into Gemini, 1987 at 14:09 UTC, into Gemini, 1989 at 01:53 UTC, into Gemini, 1990 at 07:37 UTC, into Gemini, 1991 at 13:20 UTC, into Gemini, 1993 at 01:01 UTC, into Gemini, 1994 at 06:49 UTC, into Gemini, 1995 at 12:33 UTC, into Gemini, 1997 at 00:18 UTC, into Gemini, 1998 at 06:05 UTC, into Gemini, 1999 at 11:52 UTC, into Gemini, 2002 at 05:29 UTC, into Gemini, 2003 at 11:12 UTC, into Gemini, 2006 at 04:31 UTC, into Gemini, 2007 at 10:11 UTC, into Gemini and 2010 at 03:34 UTC, into Gemini.

What these decans are read as

The first decan of Gemini is read as Gemini twice over, Mercury at full speed. People here tend to think out loud and change their mind in the same sentence. In love they need someone who can keep up with a conversation, and at work they do best with more than one thing to do.

The third decan of Taurus is read as carrying a touch of Capricorn and Saturn. It is the Taurus who builds for the long run. People here tend to be slow to commit and very hard to shake afterwards, to read love as something proved by staying, and to measure work by what is still standing in ten years.

What the number 3 adds

Numerology reads a birthday that comes to 3 as the mark of a talker and a maker. It tends to mean an easy way with words, a need to express what you feel, and some trouble finishing what stopped being fun.

The sky on May 21, 1950 to 2010

Mercury: Taurus in 34 and Gemini in 27 of 61 years. Retrograde in 1950, 1956, 1963, 1969, 1970, 1976, 1982, 1983, 1989, 1996, 2002 and 2009. Mercury in Taurus.

Venus: Aries in 16, Cancer in 16, Taurus in 15 and Gemini in 14 of 61 years. Retrograde in 1996 and 2004. Venus in Aries.

Mars: Cancer in 9, Aries in 8, Gemini in 8, Leo in 8, Taurus in 7, Virgo in 4, Aquarius in 4, Pisces in 4, Libra in 3, Scorpio in 2, Sagittarius in 2 and Capricorn in 2 of 61 years. Retrograde in 1952, 1967, 1969, 1984, 1999 and 2001. Mars in Cancer.

New Moons: 1955, 1974 and 1993. Full Moons: 1951 and 1970. Solar eclipses: 1993 (partial).

Every year's sky on May 21

At noon UTC. R: retrograde.

Who you tend to match with

Gemini: closest Libra, Aquarius and Aries; hardest Pisces. All twelve.

Taurus: closest Virgo, Capricorn and Pisces; hardest Aquarius. Its third decan leans Capricorn. All twelve.

How we calculate the sky

• May 20
• May 22
• May zodiac signs
• Gemini
• Taurus
• Birth chart calculator