'Periods' in the Bible

In you men have uncovered their fathers’ nakedness [the nakedness of mother or stepmother]; in you they have violated women who are [set apart as ceremonially] unclean during their menstrual impurity [or after childbirth].

He said to them, “It is not for you to know the times or epochs which the Father has fixed by His own authority.

And He made from one man every nation of mankind to live on the face of the earth, having determined their appointed times and the boundaries of their lands and territories.