1e480021_iness___Local_Search___Part_15__Additional_details
[Date/Area Affected / Issue] 12/01/11 Places: Hours do not update on Place Page in timely fashion [Additional details] 
It, like the description, requires an index push to change. Since that can be up to 6 weeks out, the feature is not usable for seasonal changes in hours. I experienced with Barbara Oliver in Buffalo NY
Google Places (Maps & Local) | Understanding Google My Business & Local Search - Part 15
Additional details