269. In computing any delay provided for by any act or regulation the application of which is under the supervision of the Office,(a) the day which marks the start of the delay is not counted, but the terminal day is counted;
(b) non-juridical days are counted; but when the last day is a non-juridical day, the delay is extended to the next following juridical day;
(c) Saturday is considered a non-juridical day, as are 2 January and 26 December.