Mutable sign
Encyclopedia
The mutable signs are:
  • Gemini
    Gemini (astrology)
    Gemini is the third astrological sign in the Zodiac, which spans the Zodiac between the 60th and 89th degree of celestial longitude. Generally, the Sun transits this area of the zodiac between May 21 to June 20 each year...

     () : - between the spring and summer seasons.

  • Virgo
    Virgo (astrology)
    Virgo is the sixth astrological sign in the Zodiac, which spans the zodiac between the 150th and 179th degree of celestial longitude. Generally, the Sun transits this area of the zodiac between August 23 to September 22 each year...

     () : - between the summer and autumn seasons.

  • Sagittarius
    Sagittarius (astrology)
    Sagittarius is the ninth astrological sign in the Zodiac, which spans the zodiac between the 240th and 269th degree of celestial longitude...

     () : - between the autumn and winter seasons.

  • Pisces () : - between the winter and spring seasons.


For more information, refer to the Astrological Sign
Astrological sign
Astrological signs represent twelve equal segments or divisions of the zodiac. According to astrology, celestial phenomena reflect or govern human activity on the principle of "as above, so below", so that the twelve signs are held to represent twelve basic personality types or characteristic modes...

s article.

Historical definitions

In a Byzantine scholium to Chapter 2 of the Introduction to astrology by fourth-century Hellenistic astrologer Paulus Alexandrinus
Paulus Alexandrinus
Paulus Alexandrinus was an astrological author from the late Roman Empire. His extant work, Eisagogika, or Introductory Matters , which was written in 378 CE, is a treatment of major topics in astrology as practiced in the fourth century Roman Empire.Little is known about Paulus' life...

, the following clear definition can be found:

"A double-bodied zoidion [sign] is said to be between two seasons, such as Gemini between spring and summer, ending the spring and beginning the summer [...] That is to say, double-bodied as being between the two bodies of spring and summer."

900 years later, when medieval Italian Guido Bonatti
Guido Bonatti
Guido Bonatti was an Italian astronomer and astrologer from Forlì. He was the most celebrated astrologer in Europe in his century.-Biography:...

 wrote his Liber Astronomiae, in the final years of the thirteenth century, the definition remained the same and his is more verbose:

"The moveable (cardinal) signs are so-called [...] because at the time when the Sun enters them the disposition of the air is changed [...] The common signs are so-called because when the Sun enters any of these signs it makes the time common, neither truly fixed nor truly movable, but it partakes of both, fixed and moveable. Whence part of that time it is of one [nature] and part of the other [...] when [the Sun] leaves Leo and enters Virgo, then the season is changed, and is made partly summer and partly autumnal."
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