The REAL (Nonfraudulent) Zodiac, according to the International Astronomical Union

The astrological signs that you see in your daily horoscope are 2500 years out of date due to the the axial precession of Earth, or "precession of the equinoxes".  The constellations of the zodiac are those which appear on Terra's (Earth's) elliptic plane of revolution around Sol, our planetary system's star, progressively throughout the year.  In addition to horoscope's zodiac being out of date, there are actually 13 constellations rather than 12.  The "age" is whatever sign is dominant at the time of the spring equinox, in the current case, the Age of Pisces.

(Note: Some of the dates were a few days off, so I corrected them, 4 Jul 2023)

Pisces – 12 March-18 April

Aries – 19 April-14 May

Taurus – 15 May-21 June

Gemini – 22 June-20 July

Cancer – 21 July-10 August

Leo – 11 August-16 September

Virgo – 17 September-31 October

Libra – 1 November-23 November

Scorpius – 24 November-30 November

Serpentarius aka Ophiuchus – 1 December-18 December

Sagittarius – 19 December-19 January

Capricornus – 20 January-16 February

Aquarius – 17 February-11 March

The Greek astronomer Hipparchus (c. 190-120 BCE), founder of trigonometry, discovered that the constellations in the zodiac do not sit statically in the sky but "move" due to axial precession, or progression of the equinoxes.  The discovery caused a revolution in science and philosophy and led directly to the mystery religion of Mithraism.