–          1960 – Established on 1st June.

–          1960 – Master Nawab Singh was the first student to be admitted in the school.

–          1967 – Recognized by U.T. Education Department as a Middle School from 1st April.

–          1968 – Recognized by U.T. Education Department as a High School w.e.f. 1st April.

–          1969 – Provisional Affiliation granted by CBSE for Secondary Classes w.e.f. 1st May. (The first Public School in Chandigarh to be affiliated with CBSE)

–          1970 – Chandigarh Administration allotted 5-Acre land in Sector 18-B, Chandigarh.

–          1971 – Foundation Stone of the School building laid by Shri B.P.Bagchi, ICS, Chief Commissioner, U.T. on 2nd April.

–          1971 – Affiliation granted by CBSE for Higher Secondary Classes w.e.f. 1st May.

–          1975 – Construction of the Old Block was started.

–          1978 – Classes shifted to the School premises.

–          1978 – Two board batches (Higher Secondary and Secondary newly introduced under the education system (10+2+3) appeared in the session 1978-79

–          1981 – Construction of the Old Block was completed.

–          1982 – The school was inspected by Father Kunakal (Chairman CBSE).

–          1983 – Permanent affiliation was granted by CBSE for Secondary Classes w.e.f. 1st May.

–          1986 – Silver Jubilee Celebrations of the School were held on 10th January.

–          1990 – Provisional affiliation granted by CBSE for Senior Secondary Classes w.e.f. 1st April.

–          1995 – Construction of Administrative Block was completed.

–          1995 – Construction of the Main Block was started.

–          1996 – Construction of the Basement & the Mess (Main Block) completed.

–          1999 – Construction of the Main Block completed.

–          2005 – Construction of the New Block Started.

–          2006 – Construction of Basement and Ground Floor (New Block) completed (March).

–          2006- Construction of 1st Floor (New Block) completed (July).

–          2006- Construction of 2nd Floor (New Block) completed (November).

–          2006- Construction of 3rd Floor (New Block) completed (July).

–          2006- Construction of 4th Floor (New Block) completed (Dec).

–          2007- Construction / Renovation of Basketball Grounds seating arrangement completed (September).

–          2007- 100Kva DG Set Installed.

–          2010- Construction of Tennis Courts (March).

–          2011- 500Kva Transformer Installed (February).

–          2015- Elevator installed.

–          2015- School Kitchen Renovated & Chapatti Machine Installed.

–          2015- School Benches replaced.

–          2015- Stage Constructed.

–          2017- Basketball Synthetic Courts Inauguration.