NIA Section 23

In calculating the date at which a promissory note or bill of exchange, made payable a stated number of months after date or after sight, or after a certain event, is at maturity, the period stated shall be held to terminate on the day of the month which corresponds with the day on which the instrument is dated, or presented for acceptance or sight, or noted for non-acceptance, or protested for non-acceptance, or the event happens, or, where the instrument is a bill of exchange made payable a stated number of months after sight and has been accepted for honour, with the day on which it was so accepted. If the month in which the period would terminate has no corresponding day, the period shall be held to terminate on the last day of such month.