Noun
Class Day (plural Class Days)
(US, education) In colleges and universities, a day of the commencement season on which the senior class celebrates the completion of its course by exercises conducted by the members, such as the reading of the class histories and poem, the delivery of the class oration, the planting of the class ivy, etc.
'' Coast Bus, the oldest bus operator in Kenya, runs a high class day and night service between Nairobi and the coastal city of Mombasa. Source: Internet
"Planting the ivy" was a customary class day ceremony at many colleges in the 1800s. Source: Internet