I have a customer that is able to apply business hours to reports that contain single interfaces. However, when they attempt to apply business hours to a view that contains multiple interfaces the business hours do not get applied.
Release : 3.7
Component : IM Reporting / Admin / Configuration
IM On-Demand/Multi-Metric table report does not supprt Business Hours.
Alternately use IM Table (Top)
Additional information regarding where Business Hours are supported: