Osogbo Grammar School Old Students Associate 1981 set held the first annual reunion in December, 2015 at Osogbo. During the gathering, members held a series of events, including a medical checkup for members.

Events were as follows.

Royal Father of the Day: HRH Oba Jimoh Oyetunji, Ataoja of Osogbo.
Chairman: Sir Remi Akinrinde.
Cultural Dance by Aina Immaculate Dancers.
Venue: Ghazal Holiday Inn, Opp MTN Office, Dada Estate
Date: Friday 18 to Sunday 20 December, 2015
Highlights:
Health Check and Physical Exercise by 8.00 a.m to 11 a.m
Excursion: OGS and Osun Grove by 12 noon to 2 p.m
Date for Public Invitation: Saturday 19 December 2015
*Event: Public Lecture and Award Giving Ceremony by 3.00 p.m to 6.00 p.m (Open Invitation)
Gala Night: 8.00 p.m. till day break (members only).