8 Ill. Adm. Code 1.245
Computing Time Limits
Section 1
Section 1.245 Computing Time
Limits
Saturdays, Sundays and legal
holidays for the State of Illinois shall be included in computing the time for
any act in Subpart C of this Part, except that when such time expires on a
Saturday, Sunday or legal holiday for the State of Illinois, such period shall
be extended to include the next following business day.