From [1]: Our calendar months do not coincide precisely with the actual celestial month. We are out of sync by a little bit of time (hence, Leap Year). This me

From [1]: Our calendar months do not coincide precisely with the actual celestial month. We are out of sync by a little bit of time (hence, Leap Year). This means that the Sun moves into a new zodiac sign approximately every month, anywhere between 19th and the 23rd of our month. That group of days is called a cusp, meaning the span of days in which the Sun may change sign. However, being born during those days does not automatically mean that you have two Sun signs. That is a common misconception. Birth charts are calculated using astronomical ephemerides that track the exact time of a Sun sign change for every year. If you were born between the 19th and 23rd of any month, you must check an ephemeris to see exactly where the Sun was at the time of your birth. 1: https://astrolibrary.org/zodiac/#jl-sunsign https://astrolibrary.org/zodiac/#jl-sunsign