Convocation

a meeting of a religious character as distinguished from
congregation, which was more general, dealing with political and
legal matters. Hence it is called an "holy convocation." Such
convocations were the Sabbaths (Lev. 23:2, 3), the Passover (Ex.
12:16; Lev. 23:7, 8; Num. 28:25), Pentecost (Lev. 23:21), the
feast of Trumpets (Lev. 23:24; Num. 29:1), the feast of Weeks
(Num. 28:26), and the feast of Tabernacles (Lev. 23:35, 36). The
great fast, the annual day of atonement, was "the holy
convocation" (Lev. 23:27; Num. 29:7).