What event is referred to as Bloody Sunday?

The event known as Bloody Sunday refers to a peaceful protest in 1905 that escalated into violence when demonstrators were confronted by imperial troops at the Winter Palace in St. Petersburg, Russia. The protest, led by Father Gapon, aimed to present a petition to Tsar Nicholas II, requesting reforms and better working conditions. The peaceful nature of the march contrasts sharply with the violent response it provoked from the authorities, resulting in numerous casualties among the protestors. This tragic event marked a pivotal moment in Russian history, igniting widespread discontent and leading to the 1905 Revolution, demonstrating the growing unrest among the populace towards the Tsarist regime.