A period is calculated from the day after the date on which the relevant event occurred. In the case of a notification, the event considered is the receipt of the document notified, subject to the provisions governing notification. The generally applicable procedure for notifications is indicated below. Period expiry is regulated in Rule 131(3)
to Rule 131(5)
. Under Rule 134(1)
a period expiring on a day on which the EPO is closed or on which mail is not delivered is extended to the next day on which it is open and on which mail is delivered (for example, if a period expires on a Saturday or Sunday, the next day on which it is open is Monday). The provisions in Rule 134(2)
also permit extension of a period in certain special cases.