The Sabbath, which is to be kept holy, i.e. unprofaned by any kind of work for individual profit, and marked by a religious gathering, apparently at a synagogue. The term set feast (RV) means an assembly. The same word is used in the name for the shrine, the tent of meeting. The older name for these feasts was hag, properly a pilgrimage; this term, however, would not apply to the Sabbath.
Related Commentaries of Leviticus 23:1
Leviticus 23:1-3
1 And the LORD spake unto Moses, saying,
2 Speak unto the children of Israel, and say unto them, Concerning the feasts of the LORD, which ye shall proclaim to be holy convocations, even these are my feasts.
3 Six days shall work be done: but the seventh day is the sabbath of rest, an holy convocation; ye shall do no work therein: it is the sabbath of the LORD in all your dwellings.