Female, what does it mean that there are nine characters in a birthday?

In fortune telling, months are divided according to the 24 solar terms, not according to the ordinary lunar calendar.

For example, February in the lunar calendar is Uzuki, but if you count the shock, it's still January in the lunar calendar, and it's silver moon. At this time, his eight-character month is not right with the month at that time, so it is called nine-character fortune telling.