1952 In Dhaka, East Pakistan (present Bangladesh) police open fire on a procession of students that was demanding the establishment of Bengali as the official language, killing four people and starting a country-wide protest which led to the recognition of Bengali as one of the national languages of Pakistan. The day is later declared as "International Mother Language Day" by UNESCO.
1966 Sheikh Mujibur Rahman, announces the ''Six Points'' in Karachi as the election manifesto of Awami League, that later led to formation of Bangladesh.
1970 Bhola cyclone: A 150-mph tropical cyclone hits the densely populated Ganges Delta region of East Pakistan (now Bangladesh), killing an estimated 500,000 people in one night. This is regarded as the 20th century's worst natural disaster.
1971 The People's Republic of Bangladesh forms, under Sheikh Mujibur Rahman at Mujibnagor.
1971 Pakistan severs diplomatic relations with India following New Delhi's recognition of Bangladesh.
1972 Sheikh Mujibur Rahman returns to the newly independent Bangladesh as president after spending over nine months in prison in Pakistan.
1972 East Pakistan renames itself Bangladesh.
1972 India and Bangladesh sign a friendship treaty.
1973 National Assembly of Pakistan passes a resolution on the recognition of Bangladesh.
1974 Organisation of the Islamic Conferencesummit begins in Lahore, Pakistan. Thirty-seven countries attend and twenty-two heads of state and government participate. It also recognizes Bangladesh.
1974 Bangladesh, Grenada and Guinea-Bissau join the United Nations.
1975 Bangladesh's founder Sheikh Mujibur Rahman is killed along with most members of his family during a military coup.
1975 Rahima Banu, a 2-year old girl from the village of Kuralia in Bangladesh, is the last known person to be infected with naturally occurring smallpox.
1975 In Bangladesh, a joint force of people and soldiers took part in an uprising led by Col. Abu Taher that ousted and killed Brig. Khaled Mosharraf. The uprising, hailed as National Revolution and Solidarity Day, also helped Gen. Ziaur Rahman (later President of Bangladesh) to get freed from the house arrest that was enforced by Mosharraf four days ago amid a coup d'état.
1985 Bangladesh is hit by a tropical cyclone and storm surge, which kills approximately 10,000 people.
1986 {{convert|1|kg|lb}} hailstones fall on the Gopalganj district of Bangladesh, killing 92. These are the heaviest hailstones ever recorded.
1991 A cyclone strikes the Chittagong district of southeastern Bangladesh with winds of around 155 mph, killing at least 138,000 people and leaving as many as 10 million homeless.
1996 Severe thunderstorms and a tornado in Bangladesh kill 600 people.
2007 Cyclone Sidr hit Bangladesh, killing an estimated 5000 people and destroyed the world's largest mangrove forest, Sundarbans.
2009 BDR massacre in Pilkhana, Dhaka, Bangladesh. 74 people are killed, including more than 50 army officials, by Bangladeshi Border Guards inside its headquarters.