Does everyone have a double constellation?

In fact, double constellations do not exist. If you must think so, you can only call it a double constellation on the day when you were born at the top of two constellations. For example, on May 22nd, some people say that this day is the last day of Taurus, and some people say that it is the first day of Gemini, so this day is called "Taurus Gemini".