'Month' in the Bible

Now in the fortieth year, on the first day of the eleventh month, Moses gave to the children of Israel all the orders which the Lord had given him for them;

Take note of the month of Abib and keep the Passover to the Lord your God: for in the month of Abib the Lord your God took you out of Egypt by night.

And let her take off the dress in which she was made prisoner and go on living in your house and weeping for her father and mother for a full month: and after that you may go in to her and be her husband and she will be your wife.