March 1 was the National Day of Remembrance of the Cursed Soldiers, a recently created holiday in Poland that pays tribute to the anti-communist resistance after World War II.
Further Reading:
Cursed Soldiers on Wikipedia
The Medallion in the Skull (my translation of an interview with Dr. Krzysztof Szwagrzyk, head of the Institute of National Remembrance historian and archeologist in charge of exhuming the remains of Polish soldiers killed by the communists)
Exhuming the Victims of Communism in Poland (my report on the conference at the Warsaw Institute of Technology dedicated to the exhumation work of communist victims being carried out by the Institute of National Remembrance)
My Visit Inside Rakowiecka Prison in Warsaw (my inside look at the prison where hundreds of the Cursed Soldiers were imprisoned and killed during the Stalinist era)
