Seven days ye shall offer an offering made, by fire unto the
 Lord
 A burnt offering; what this was, and how many were offered on each day, see at large in ( Numbers 29:13-34 ) ; 
 on the eighth day shall be an holy convocation unto you;
 as on the first day; (See Gill on  Leviticus 23:35): 
 and ye shall offer an offering made by fire unto the Lord;
 which was different from that on all the other days, being one bullock only ( Numbers 29:35 Numbers 29:36 ) ; 
 it [is] a solemn assembly;
 of all the people, when they were gathered together before the Lord. Some render the word used a "restraint" or "detention", and interpret it of restraining or detaining them from servile work, as in the next clause; so Aben Ezra and Gersom; but this sense seems to make that clause unnecessary and is never used elsewhere where that is: 
 ye shall do no servile work [therein];
 as on the first day; (See Gill on  Leviticus 23:35).