Is the constellation calculated by the year of birth?

The constellation is western, so if you were born on July 2nd of the Gregorian calendar, you are a cancer. If it is the birthday of June in the solar calendar, it will be Cancer in the second half and Gemini in the first half. The constellation is based on the specific month and date of the year you were born, which means that the month and date are more important; For example, people born on July 2, 2008 have many similarities with those born on July 2, 2009. There are many things about the personality characteristics of Cancer and Gemini, as well as the horoscope and horoscope. If there is anything you don't understand, you can ask me. I have been watching horoscopes since the fifth grade of primary school ~ ~ hehe.