When did the third estate form the national assembly?

The Third Estate formed the National Assembly on June 17, 1789, during the early stages of the French Revolution. This action was taken after they were frustrated by their lack of representation and influence in the Estates-General, prompting them to declare themselves the true representatives of the French people. The formation of the National Assembly marked a pivotal moment in the revolution, as it signified a shift towards a more democratic governance structure.