DC expands business hours to better serve students Posted on September 9, 2019 at 2:21 pm. Durham College is pleased to announce the expansion of core business hours for its academic school offices and student support services. These changes will help match access to resources with the level of evening activity on campus and further enhance students’ experience. The new hours of operation for the fall and winter semesters at the Oshawa and Whitby campuses are: Monday to Thursday 8 a.m. to 7 p.m. Friday 8 a.m. to 4:30 p.m. Updated hours are also posted on individual student service and support area web pages. SHARE: