The Clarkston Post Office extended their hours of operation on weekdays and Saturday. The longer hours mean more people should have the opportunity to make it to the post office after work or on weekends. The extension, in conjunction with services available on www.usps.com, are an attempt to make mail services more convenient for people. The Clarkston Post Office hours are 8:30 a.m.-6 p.m. on weekdays and 10 a.m.-3 p.m. on Saturday.