Unless the council sets a different date and time for a particular meeting, the council shall meet at 6:00 p.m. on the first and third Thursdays of each month in the council chambers. If business is not finished by 10:00 p.m., the mayor shall adjourn the meeting, unless a majority of the councilmembers present vote to continue in session. Unfinished business shall automatically be placed on the next regular council agenda, unless the council specifies a different time for consideration of such items. On holidays, the council shall meet on the Thursday next following the holiday.