| 1854 | College Founded In Kandy. |
| 1875 | The Administration Entrusted To O.S.B. Priests. Rev. Fr. Hilderbrad Vanderstaatan – Principal. |
| 1876 | Boarding Life Introduced. |
| 1880 | Secular Teachers Took Over. |
| 1892 | Back In The Hands Of The O.S.B. Priests. Rev. Fr. Hilarian Leitan – Principal. |
| 1898 | Rev. Fr. Maurus Craner – Principal. |
| 1903 | Cricket Introduced. |
| 1907 | Rev. Fr. Philip Casperz – Principal. |
| 1911 | O.B.A. Formed. |
| 1913 | Cadeting Introduced. |
| 1914 | First Trinity – Antonian Cricket Match. |
| 1915 | Rev. Fr. Basil Hyde – Principal. |
| 1916 | Scouting Introduced. Rev. Fr. James Casperz – Principal. |
| 1918 | Jack Anderson Record In Cricket. |
| 1921 | Rev. Fr. Laurence Hyde – Principal. |
| 1928 | College Shifted To Katugastota. |
| 1930 | House System Introduced. |
| 1934 | Two Storied Block In The Upper School Completed First Boarding House At Katugastota. |
| 1935 | Playground Commissioned. |
| 1938 | Bede Gold Medal Introduced. |
| 1940 | Rev. Fr. Robert Perera Appointed Principal. |
| 1941 | Kandy Branch Renamed. |
| 1942 | College Taken Over By The Army. |
| 1944 | Rev. Fr. Angelo Rosati – Principal. |
| 1946 | Reoccupation Of The College. |
| 1951 | Joined The Free Education System. |
| 1954 | Centenary Celebrations. |
| 1956 | Rugger Introduced. First School Boy Cricketer – Wijepala Premaratna. |
| 1957 | Centenary Hall Commissioned. Rev. Fr. Hilarion Rudolph – Principal. |
| 1959 | School Boy Cricketer – Charlie Joseph. |
| 1960 | Take Over Of Schools – Opted To Go Private School Boy Cricketer – Charlie Joseph. |
| 1961 | Rev. Fr. Ildaphonsus Robinson – Principal. |
| 1962 | Cadeting Withdrawn. School Boy Cricketer – Franklyn Burk. |
| 1966 | First Colors Award Ceremony. |
| 1967 | Tamil Cultural Society Formed. |
| 1968 | Rev. Fr. Aidan Silva – Principal. |
| 1970 | Turf Pitch Commissioned. |
| 1972 | College Council Inaugurated. |
| 1973 | Buddhist Brotherhood Association Introduced. |
| 1974 | First Maths Lab Commissioned. |
| 1976 | School Boy Cricketer – Bernard Perera. |
| 1977 | Rev. Fr. D.L. Amarasinghe – Principal. |
| 1978 | College In The Hands Of The Government. |
| 1979 | 125th Jubilee Celebrations. Rev. Fr. Stephen Abraham – Principal. |
| 1980 | 50 Over Cricket Match Inaugurated. |
| 1981 | National Youth Award Scheme Introduced. |
| 1982 | Opening Of The Premadasa Block. Cadeting Re-Introduced. |
| 1986 | Laying Of The Foundation Of Leo Nanayakkara Sports Complex. |
| 1987 | Re-Introduction Of The College Diary. A/L Students Valedictory Function Introduced. Festival Of English ‘One Act Plays’ Introduced. |
| 1988 | Public Address System Introduced. |
| 1989 | Sacerdotal Silver Jubilee Of Rev. Fr. Stephen’s 25 Houses At ”Anthoni Gama” Gifted To The Minor Employees. St. John’s Ambulance Brigade Introduced. |
| 1990 | Interact Club Introduced. |
| 1991 | School Boy Cricketer – M. Muralitharan. 75th Jubilee Celebrations – Scouting First Super Eagles Awarded. |
| 1992 | Commissioning Of The Gymnasium. School Boy Cricketer – Sajith Fernando. Silver Jubilee – Tamil Cultural Society. Centenary – Unbroken Service Of The Benedictine Fathers. |
| 1993 | 75th Anniversary Of Jack Anderson Record. Jack Anderson Pavilion Commissioned. Drug Prevention Unit Introduced . Art Foundation Introduced. Reintroduction Of Sinhala Cultural Show. |
| 1994 | Rev. Fr. Stephen Abraham O.S.B. Retires After 16 Years Of Service. Fr. D. Hilarion Fernando O.S.B. Principal. |
| 1995 | O.S.B. Fathers Celebrate 150th Anniversary Of Their Arrival In Sri Lanka. |
| 1998 | Celebrations Of 70 Years Of College (Out Of 144 Years) At Katugastota. |
| 1999 | Air Cushioned Parquet Floor For The Gymnasium. |
| 2000 | Completion Of 3rd Stage Of Gymnasium. Inauguration Of 5 Year Preparation For 150th Anniversary In 2004 With Millennium Walk And Cultural Show. – Felicitation Of M. Muralitharan For His World Record Of 7 For 30 In Limited Over Cricket; Over 300 Wickets In Test Cricket In 10 Years Of Test Cricket. |
| 2001 | Completion Of Elkaduwa Block In Upper School. – Oba – Colombo Branch Celebrates Her 75th Anniversary. |
| 2002 | New Five Class Room Block And Computer Lab At Primary. |
| 2003 | 75 Years At Katugastota – Celebrations & Walk. |
| 2004 | Sesquicentennial Celebrations (Jubilee Blocks; Ground Extension; New Scout Den; New Basketball Court; Archives) Excellence Awards And Staff Honors Day. President Kumaratunga At Prize Giving. |
