Three all-important events in Harvard's history will be fittingly observed by a service in the Memorial Church at 8:45 o'clock Saturday morning. These are the end of the Tercentenary year, the beginning of Harvard's fourth century, and John Harvard's 329th birthday.

The service will be conducted by Rev. Raymond Calkins '90, Minister of the First Church in Cambridge. This parish is one of the six whose ministers, along with the six magistrates, constituted the original Board of Overseers. Attendance at the service, which will be held in the main part of Memorial Church instead of in Appleton Chapel, will be limited to men.

University officials hope to make an annual institution of the double observance of the Founding of the College and John Harvard's birthday. With this year's service the Tercentenary celebration becomes a thing of the past.