IDAPA 31.01.01.017
Computation Of Time (Rule 17)
Whenever statute, these or other rules, order, or notice requires an act to be done within a certain number of days of a given day, the given day is not included in the count. If the day the act must be done is a Saturday, Sunday or legal holiday, the act may be done on the first day following that is not a Saturday, Sunday or legal holiday. (3-31-22)