300.11—Day; business day; school day.
        
        (b) 
        
            Business day means Monday through Friday, except for Federal and State holidays (unless holidays are specifically included in the designation of business day, as in  § 300.148(d)(1)(ii) ).
    
    
        
        (c) 
        
        (1) 
        
            School day means any day, including a partial day that children are in attendance at school for instructional purposes.
    
    
        
        (2) 
        
            School day has the same meaning for all children in school, including children with and without disabilities.