October-November 1956 — in many Polish cities leaflets appear that appeal for solidarity with the Hungarians and demonstrations are organized in their support.     

From a report submitted by the Security’s Office (UB) division in Olsztyn:

   On October 30, 1956 [...] a demonstration of solidarity with the Hungarian insurgents was organized. The demonstrators [...] set out from the school’s grounds and marched through the  city’s streets towards Czerwonej Armii (Red Army) square where the Polish and Hungarian national flags and candles had been placed. [...]. Next, the marchers proceeded through the streets towards Gen. Świerczewski square where a rally was staged, which gathered some 10,000 people. [...] Towards the end of the rally [...] the demonstrators accepted by voting a proposal, put forward by one of the students, to change the name Red Army square into Hungarian Insurgents square. After that the participants in the rally sang the national anthem.