The Mayor shall call the Council to order at each regular and special meeting at 7:00 p.m. unless the Council shall have adjourned to some other hour, or unless the Council shall, at the previous meeting, fix a different time for the regular or special meeting of the Council. The Council shall have the authority to fix a different time, other than 7:00 p.m., for regular or special council meetings, for as many regular or special meetings in advance as the Council shall deem advisable.