Western astrology starts the zodiac at the March equinox, Vedic astrology at the stars, and the two sit about 24° apart. So the Sun reaches Cancer about 24 days later in the Vedic zodiac, and most people with a Western Cancer Sun have a Vedic Gemini Sun.
When the Sun is in Cancer
Western Cancer
21 Jun – 22 Jul
Vedic Cancer
16 Jul – 15 Aug
Western Cancer: your Vedic Sun
Born 21 Jun – 15 Jul
Vedic Sun in Gemini
Born 16 Jul – 22 Jul
Cancer in both zodiacs
Dates for someone born around 1990, in UTC. They move a day either way with the birth year and time; a chart in Unseen Signs is exact to the minute.
The nakshatras of Vedic Cancer
Vedic astrology also divides the sky into 27 nakshatras, the lunar mansions. Vedic Cancer holds:
The same 24° shift applies to every planet and to the rising sign, so most charts change in several places at once. Your birth date, time and place show your Sun, Moon and rising sign in both zodiacs.