UNLEAVENED BREAD IS FROM THE 15TH TO 21ST OF THE FIRST MONTH

Leviticus 23:6 And on the fifteenth day of the same month is the feast of unleavened bread unto the LORD: seven days you must eat unleavened bread.

Leviticus 23:7 In the first day ye shall have an holy convocation: ye shall do no servile work therein.

Leviticus 23:8 But ye shall offer an offering made by fire unto the LORD seven days: in the seventh day is an holy convocation: ye shall do no servile work therein.