28 CFR 68.8 - Time computations.
(a) Generally. In computing any period of time under these rules or in an order issued hereunder, the time begins with the day following the act, event, or default, and includes the last day of the period unless it is Saturday, Sunday, or legal holiday observed by the Federal Government in which case the time period includes the next business day. When the period of time prescribed is seven (7) days or less, intermediate Saturdays, Sundays, and holidays shall be excluded in the computation.
(c) Computation of time for service by mail.
(1) Service of all pleadings other than complaints is deemed effective at the time of mailing; and
(2) Whenever a party has the right or is required to take some action within a prescribed period after the service upon such party of a pleading, notice, or other document (other than a complaint or a subpoena) and the pleading, notice, or document is served by ordinary mail, five (5) days shall be added to the prescribed period unless the compliance date is otherwise specified by the Chief Administrative Hearing Officer or the Administrative Law Judge.