1917 : Founded as a "Baptist Missionary English School" by the Baptist Missionary Society of British Ceylon. It was started with only three girls, in the premises of Baptist Church in Ratnapura.
1919 : The classroom was moved to the thatched-roofed spacious hall at the hilltop to accommodate the increasing number of 36 students.
1921 : The school was registered as a 'Grant-in-aid English School'
1924 : The school hostel was started.
1925 : Girl Guide Association was pioneered by C. Balasooriya.
1928 : The school known as Baptist Missionary English School was renamed as Ferguson High School in memory Mr. John Ferguson who helped the Baptist Missionary Society in Ceylon.
1932 : The system of school houses was introduced by the acting principal W. F. Gadge.
1933 : The Old Girls Association was initiated by Miss. Allsop.
1958 : School prize giving was held by the Chief guest Madam Sirimavo Bandaranayaka who was a former student of the school.
1960 : Became a Director Managed Government School and no longer a Christian assisted school
1993 : The school was recognized as a National school and 75th Birthday was celebrated with the participation of President Ranasinghe Premadasa
2010 : “Wisdom 2010” educational and Trade exhibition was held.
2017 : 100th anniversary of the school was celebrated with the participation President Maithripala Sirisena. A souvenir stamp was issued
2018 :
2019 :
2020 :
2021 :
2022 :