Leviticus 23:1

“And the Lord spake unto Moses, etc.] Much about the same time as before; and having delivered to him various laws concerning the holiness of the people of Israel, who were to serve him, and of the holiness of the priests, that were to minister in holy things to him, and of the purity and perfections of their sacrifices, he here appoints various times and seasons, for the more special worship and service of him: saying; as follows.”

“OF SUNDRY FEASTS. (Lev 23:1-4) Speak unto the children of Israel, . . . concerning the feasts of the Lord--literally, "the times of assembling, or solemnities" (Isa 33:20); and this is a preferable rendering, applicable to all sacred seasons mentioned in this chapter, even the day of atonement, which was observed as a fast. They were appointed by the direct authority of God and announced by a public proclamation, which is called "the joyful sound" (Psa 89:15). Those "holy convocations" were evidences of divine wisdom, and eminently subservient to the maintenance and diffusion of religious knowledge and piety.”

“The specified times for public worship according to the Law were; (1) The daily morning and evening sacrifices, sometimes called “the continual burnt-offering.” (2) The weekly Sabbath. (3) the day of the new moon. (4) the “set feasts” Numbers 29:39 or appointed times of annual observance, of which there were five, the Passover, the Day of Pentecost, the Feast of Trumpets, the Day of Atonement, and the Feast of Tabernacles. For each of these occasions special sacrifices were appointed Numbers 28:0; Numbers 29:0. return to 'Top of Page'”

“This chapter does not contain a "calendar of feasts," or a summary and completion of the directions previously given in a scattered form concerning the festal times of Israel, but simply a list of those festal days and periods of the year at which holy meetings were to be held. This is most clearly stated in the heading ( Lev 23:2): "the festal times of Jehovah, which ye shall call out as holy meetings, these are they, My feasts," i.e., those which are to be regarded as My feasts, sanctified to Me. The festal seasons and days were called "feasts of Jehovah," times appointed and fixed by Jehovah (see Gen 1:14), not because the feasts belonged to fixed times regulated by the course of the moon…”