(a)
a period of days shall be computed as beginning on the day next following the event which began the period and ending at midnight on the last day of the period, except that if the last day of the period does not fall on a business day, the period terminates at midnight on the next business day, and
(b)
a take-over bid or an issuer bid expires at the later of
(i)
the end of the period, including any extension, during which securities may be deposited pursuant to the bid, and
(ii)
the time at which the offeror becomes obligated by the terms of the bid to take up or reject securities deposited pursuant to the bid.