Final answer:
If your birthday is between April 19th and May 20th, your zodiac sun sign is Taurus, according to the traditional astrological system which has remained unchanged since its establishment over 2000 years ago. Option 2 is correct.
Step-by-step explanation:
If your birthday falls between April 19th and May 20th, your zodiac sun sign is Taurus. Zodiac signs are part of astrology, which assigns symbols to different periods of the year based on the positions of celestial bodies. The signs have remained constant with the dates set when astrology was established, despite the precession causing a shift in the constellations and their relation to the zodiac signs. Therefore, the sun sign given in horoscopes corresponds to where the Sun would have been in ancient times, not where the constellation is today.
Moreover, the term "sun sign" refers to the zodiac sign the Sun was in at your moment of birth. Over 2000 years have slipped by since the signs were named after the constellations, and due to precession, the constellations have moved approximately 1/12 of the zodiac, about the width of one sign. Astrologers use a horoscope, which marks the positions of the planets at the time of an individual's birth, to interpret potential effects on their life.