The City Council shall hold regular meetings at least twice each month at such times as it shall fix by ordinance or resolution and may adjourn or re-adjourn any regular meeting to a date and hour certain which shall be specified in the order of adjournment and when so adjourned each adjourned meeting shall be a regular meeting for all purposes. If the hour to which a meeting is adjourned is not stated in the order of adjournment, such meeting shall be held at the hour for holding regular meetings. If at any time any regular meeting falls on a holiday such regular meeting shall be held on the next business day.