Ontario Secondary School Diploma types & Entry Dates
SSGD - entered Gr 9 Sept 1, 1983 or earlier
OSSD (89) - Sept 1, 1984 - Aug 31, 1999
OSSD (99) - Sept 1, 1999 - Aug 31, 2024
Current OSSD (2025) - Sept 1, 2024 and onward