Title VIII of the Act and the regulations in this part require you to take certain actions within specified time periods or you may lose your right to a portion or all of your benefits. If any such period ends on a Saturday, Sunday, Federal legal holiday, or any other day all or part of which is declared to be a nonworkday for Federal employees by statute or Executive Order, you will have until the next Federal workday to take the prescribed action.
20 C.F.R. §408.120