20 17 why does the Gregorian calendar in beginning of spring show February 3rd, but in general books it is beginning of spring on the seventh day of the first month?

I think so, too, but it says beginning of spring in childhood (from night 1 1 to morning 1). The evening of February 2nd 1 1 to 12 is the time of grade six. 12 0 1 to 1 is the seventh grade, so from 1 1 to the evening 12, it is still the seventh grade, and after 12, it is the eighth grade. If these are true. (It should be at the beginning of February 3rd at 00:00 in beginning of spring).