Main events of February Revolution:

22 February: Factory lockout on the right bank. 23 February: Sympathy strike by workers in 50 factories. 24th & 25th: Strikers stage demonstrations. Police called out to suppress the workers. 25th: The government suspends the Duma. 27th: Police Headquarters ransacked by the workers. Regiments support the workers. Striking workers from the Petrograd soviet. 2nd March: The Tsar abdicates. Soviet and Duma leaders form the Provisional Government.