The English phrase appointed feasts
is derived from a Hebrew noun root meaning to appoint
or to designate.
In the present context it refers to specific times that the Lord has set in the Hebrew calendar. In other words, it is a technical phrase relating to religious festivals throughout the year (see Exodus 13:10; Exodus 23:15; Exodus 34:18).
2 “Speak to the people of Israel and say to them, These are the appointed feasts of the LORD that you shall proclaim as holy convocations; they are my appointed feasts.