Charles Ellicott Commentary Leviticus 23:7

"In the first day ye shall have a holy convocation: ye shall do no servile work." — Leviticus 23:7 (ASV)

In the first day. —That is, the first of the seven days, or the fifteenth of the month Nisan. .

You shall do no servile work on it. —Servile work was defined during the Second Temple to consist of building, pulling down buildings, weaving, reaping, threshing, winnowing, grinding, etc., while necessary work that was allowed was killing animals, kneading dough, baking bread, boiling, roasting, etc. For violating this law, the offender was not to be stoned to death, as in the case of violating the Sabbath, but to receive forty stripes minus one.