Day,
Day, when computing the period of time for taking any action provided in this chapter I including the taking of an appeal, shall include Saturdays, Sundays, and legal holidays, except that when the last day of the period computed falls on a Saturday, Sunday, or a legal holiday, the period shall run until the end of the next day which is not a Saturday, Sunday, or a legal holiday.
Source
8 CFR § 1.2
Scoping language
As used in this chapter I, the term: