Definitions for "Class day"
In American 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.
A ceremony that takes place the day before Commencement and honors the achievements and service of Princeton seniors.
a day on which lecture section of the course meets