Del. Code tit. 25, § 5112

In computing any period of time prescribed or allowed by order of the Court or by any applicable statute, the day of the act, event or default from which the designated period of time begins to run shall not be included unless specifically included by statute, order or rule. The last day of the period so computed shall be included, unless it is a Saturday, Sunday or a legal holiday, in which event the period runs until the end of the next day which is not a Saturday, Sunday or a legal holiday. When the period of time prescribed or allowed is less than 7 days, intermediate Saturdays, Sundays and legal holidays shall be excluded from the computation.