12 constellation calendar, why are there many different 12 constellation calendars? Which one is true?

12 constellation date table has been passed on by so many people for so long. It is normal to have different schedules. These schedules are similar and generally do not affect the use. As for which timetable is true, it's hard to say. Everyone thinks that the timetable in their hands is true. The following timetable is a timetable that I have used for more than ten years. I have used it for more than ten years, and nothing has gone wrong, so I think my schedule is true.