National Day of Remembrance of the Victims of the Genocide of the Citizens of the Polish Republic Committed by Ukrainian Nationalists
The National Day of Remembrance of the victims of the Genocide of Citizens of the Polish Republic committed by Ukrainian Nationalists () is an official commemorative date in Poland, marked on July 11. It is not a day off. The day of July 11 was chosen because it was July 11, 1943, that became the apogee (Volhynian Bloody Sunday) of the  massacres of Poles in Volhynia and Eastern Galicia when armed units of Ukrainian nationalists simultaneously attacked 99 settlements inhabited by ethnic Poles. History of establishment

On July 15, 2009, the Sejm of Poland, in its resolution (adopted by unanimous acclamation without voting procedure) stated, that the Organization of Ukrainian Nationalists (OUN) and Ukrainian Insurgent Army (UPA) carried out "an anti-Polish actionmass killings that had the character of ethnic cleansing and had signs of genocide". In addition, the Sejm "honors the memory of the Home Army soldiers, Self-Defense of the Eastern Kres and Peasant battalions who rose to the dramatic struggle to protect the Polish civilian population and also remembers with pain the victims among the Ukrainian civilian population". On July 15, 2013, the Sejm adopted a special resolution dedicated to the 70th anniversary of the "Volyn Crime" (this name is used in the resolution), which notes that the crimes committed by the OUN and UPA had an "organized and massive scale", which gave them "the character of ethnic cleansing with signs of genocide." On July 7, 2016, the Senate of Poland adopted a resolution "on the issue of perpetuating the memory of the victims of the genocide committed by Ukrainian nationalists against citizens of the Second Polish Republic in 1939-1945." On July 22, 2016, the Sejm established this memorial day in memory of the victims of the Volyn massacre of the Polish population, organized by the fighters of the OUN, UPA, SS Galicia division and other Ukrainian formations during World War II. Deputies from the Polish Peasant Party proposed another name"The Day of Remembrance of the Polish victims of the genocide committed by the OUN-UPA on the Eastern Borders of the Second Polish Republic". Reaction in Ukraine  
President of Ukraine Petro Poroshenko in his Facebook account expressed the opinion that he "regrets the decision of the Polish Sejm. I know that many will want to use it for political speculation. However, we should turn to the testament of John Paul IIwe forgive and ask for forgiveness." The Verkhovna Rada Committee on Foreign Affairs of Ukraine issued a special statement in which it expressed "deep concern" about the resolution of Sejm. The far-right Svoboda party condemned the decision of the Polish Sejm. References

Massacres of Poles in Volhynia
Public holidays in Poland