2.9.—(1) This rule shows how to calculate any period of time for doing any act which is specified—
(a)by these rules;
(b)by a practice direction; or
(c)by a direction or order of the court.
(2) A period of time expressed as a number of days must be computed as clear days.
(3) In this rule “clear days” means that in computing the numbers of days—
(a)the day on which the period begins; and
(b)if the end of the period is defined by reference to an event, the day on which that event occurs,
are not included.
(4) Where the specified period is 7 days or less and includes a day which is not a business day, that day does not count.
(5) When the period specified—
(a)by these rules or a practice direction; or
(b)by any direction or order of the court,
for doing any act at the court office ends on a day on which the office is closed, that act will be in time if done on the next day on which the court office is open.