Charles Ellicott Commentary Leviticus 23:2

"Speak unto the children of Israel, and say unto them, The set feasts of Jehovah, which ye shall proclaim to be holy convocations, even these are my set feasts." — Leviticus 23:2 (ASV)

Speak to the children of Israel. — As the festivals here discussed were to be solemnly kept by them, Moses is ordered to address these regulations to the people or their representatives.

Concerning the feasts of the Lord ... Better, the festivals of the Lord which you shall proclaim as holy convocations, these are my festivals. That is, the following festivals God claims as His, on which solemn assemblies are to be held in the sanctuary.