The Scripture that you are referring to is found in Leviticus 23:6-8, “And on the fifteenth day of the same [first] month is the Feast of Unleavened Bread to the LORD; seven days you must eat unleavened bread. On the first day you shall have a holy convocation; you shall do no customary work on it. But you shall offer an offering made by fire to the LORD for seven days. The seventh day shall be a holy convocation; you shall do no customary work on it.' "
It is correct that we should be keeping this Feast as well the other five annual Holy Days mentioned in this chapter. (For more information, please read our free booklet, “God’s Commanded Holy Days.” ). But there are a couple of other points that are noteworthy.
"You are the light of the world. A city that is set on a hill cannot be hidden."
-Matthew 5:14