<Li> Mughal Empire, c. 1576--c. 1717 <Ul> <Li> Bengal Subah </Li> </Ul> </Li> <Ul> <Li> Bengal Subah </Li> </Ul> <Tr> <Td> Modern (show) <Ul> <Li> Nawabs of Bengal, c. 1717--c. 1757 </Li> <Li> Company Raj, c. 1757--c. 1858 </Li> <Li> Faraizi Movement, c. 1818--c. 1884 </Li> <Li> The Great Rebellion, c. 1857--c. 1858 </Li> <Li> British Raj, c. 1858--c. 1947 <Ul> <Li> Bengal Renaissance </Li> <Li> Eastern Bengal and Assam </Li> <Li> Prime Minister of Bengal </Li> </Ul> </Li> <Li> East Bengal, c. 1947--c. 1955 <Ul> <Li> Bengali Language Movement </Li> </Ul> </Li> <Li> East Pakistan, c. 1955--c. 1971 <Ul> <Li> Six Point Movement </Li> <Li> 1969 uprising in East Pakistan </Li> <Li> Pakistani general election, 1970 </Li> </Ul> </Li> <Li> Bangladesh Liberation War, c. 1971 <Ul> <Li> </Li> <Li> Declaration of Independence </Li> <Li> Provisional Government of Bangladesh </Li> <Li> 1971 Bangladesh Genocide </Li> <Li> Bangladesh Forces </Li> </Ul> </Li> <Li> Bangladeshi Republic, c. 1972--present </Li> </Ul> </Td> </Tr> <Ul> <Li> Nawabs of Bengal, c. 1717--c. 1757 </Li> <Li> Company Raj, c. 1757--c. 1858 </Li> <Li> Faraizi Movement, c. 1818--c. 1884 </Li> <Li> The Great Rebellion, c. 1857--c. 1858 </Li> <Li> British Raj, c. 1858--c. 1947 <Ul> <Li> Bengal Renaissance </Li> <Li> Eastern Bengal and Assam </Li> <Li> Prime Minister of Bengal </Li> </Ul> </Li> <Li> East Bengal, c. 1947--c. 1955 <Ul> <Li> Bengali Language Movement </Li> </Ul> </Li> <Li> East Pakistan, c. 1955--c. 1971 <Ul> <Li> Six Point Movement </Li> <Li> 1969 uprising in East Pakistan </Li> <Li> Pakistani general election, 1970 </Li> </Ul> </Li> <Li> Bangladesh Liberation War, c. 1971 <Ul> <Li> </Li> <Li> Declaration of Independence </Li> <Li> Provisional Government of Bangladesh </Li> <Li> 1971 Bangladesh Genocide </Li> <Li> Bangladesh Forces </Li> </Ul> </Li> <Li> Bangladeshi Republic, c. 1972--present </Li> </Ul>

When was the state language movement council formed