Is it normal for an aunt to come two days early?

It is normal for an aunt to come two days in advance, because a woman's menstrual cycle itself is 28 days, which includes the follicular phase and the luteal phase. Under normal circumstances, the follicular phase is 14 days and the luteal phase is 14 days, which is exactly 28 days., so for most women, menstruation is two days in advance. Of course, every woman has her own menstrual cycle, some people may be a little earlier, some people may be a little later, as long as every time is like this, it is normal phenomenon. But some women will show abnormal menstruation, menstrual cycle sometimes early, sometimes delayed and so on.