definiens: 1.2.4 The term shall mean a calendar day, commencin g at 12:00 a.m. ( prevailing Eastern time ) . The term shall mean a calend ar month ; provided, that when a period measured in months commences on a date other than the first ( 1s t ) day of a month, the period shall run from the da te on which it commences to the corresponding date in the next month and, as appropriate, to succeeding months thereafter . Whenever an event is to be perfo rmed or a payment is to be made by a particular dat e and the date in question falls on a day which is no t a Business Day, the event shall be performed, or the payment shall be made, on the next succeeding Busin ess Day ; provided, however, that all calculations shall be made regardless of whether any given day i s a Business Day and whether or not any given perio d ends on a Business Day