Charter Oak & Hilltop Apartments. The occupancy period for newly admitted undergraduate freshmen residents begins on August 24, 2018 and concludes on May 31, 2019. The occupancy period for all other residents begins on August 25, 2018 and concludes on May 31, 2019. For the Spring 2019 semester, the occupancy period for new residents begins on January 20, 2019 and concludes on May 31, 2019.