3. (1) In this Act, unless the contrary intention appears—“court” means the Supreme Court or the Magistrates Court; “custodial officer” means a custodial officer as provided for by section 37; “dentist” means a registered dentist within the meaning of the Dentists Registration Act 1931; “detainee” means an offender in respect of whom an order for periodic detention is in force; “detention centre” means a place declared to be a detention centre under section 42; “detention period”, in relation to a detainee, means a period that, subject to any order of the Director under section 16—
(a) commences at 7.00 p.m. on the same day of the week as the date specified in the order of the court imposing the sentence as the day on which the sentence commences; and
(b) ends at 4.30 p.m. on the second day after the day on which the period commences;
but does not include any such period which includes the whole or any part of Christmas Day, Good Friday or Easter Sunday;
(2) A reference in this Act to an order for periodic detention shall, if the order has been varied, be read as a reference to the order as varied, unless the contrary intention appears.