2 Ill. Adm. Code 700.230
Computing Time
Section 700
Section 700.230Â Computing
Time
Saturdays, Sundays and legal
holidays commenting for the State of Illinois shall be included in computing
the time for comenting on a rulemaking proposal, 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. This rule
is applicable for computing all time periods established in these rules.