28. Where there is a reference to a period of time consisting of a number of months after or before a specified day, the period is calculated by

(a) counting forward or backward from the specified day the number of months, without including the month in which that day falls;

(b) excluding the specified day; and

(c) including in the last month counted under paragraph (a) the day that has the same calendar number as the specified day or, if that month has no day with that number, the last day of that month.

R.S., c. I-23, s. 25.