Leviticus 23:2-4

2“Tell the Israelites: These are the appointed festivals with the Lord, which you must announce as holy assemblies.

3You may work for six days. But the seventh day is a day of rest, a day when you don’t work, a holy assembly. Don’t do any work. It is the Lord’s day of rest—a holy day wherever you live.

4“The following are the Lord’s appointed festivals with holy assemblies, which you must announce at their appointed times.