The February Revolution (sometimes called the March Revolution, due to discrepancies between the Russian and Western calendars) was a large protest against Czar Nicholas II of Russia in March 1917. It forced the Czar to abdicate the throne and did not allow his heir, Alexis, to inherit it. A provisional government was established with Prince Lvov and later the socialist Alexander Kerensky as the leader. The ineffective new government was later overthrown in the October Revolution, which installed the Bolshevik Party under V.I. Lenin, an old family friend of Kerensky who attended law school with him.