The document summarizes the history of the Bengali Language Movement in Bangladesh that started after Pakistan declared Urdu as the sole national language in 1947. Major events included protests by students and intellectuals in Dhaka University that grew into a mass movement. In 1952, police opened fire on protesting students on February 21st, killing several. This led to February 21st being commemorated as Language Martyrs Day. The movement was significant as it laid the foundation for Bangladesh's liberation war and ultimately led to the recognition of Bengali as an official language of Pakistan in 1956.