Nations that observe August 23rd as a day of remembrance for the victims of the Soviet communists and Nazi Germans:

• European Union (2009)
• Albania (2019)
• Bulgaria (2009) Day of Remembrance for Victims of Stalinism and Nazism
• Canada (2009) 
• Croatia (2011) Day of Remembrance for Victims of Stalinism and Nazism
• Czech Republic (2016) Day of Remembrance for Victims of Stalinism and Nazism
• Estonia (2009) Day of Remembrance for Victims of Stalinism and Nazism
• Finland (2019)
  The European Day of Remembrance for Victims of Stalinism and Nazism was observed by the Government of Finland on the occasion of the 80th anniversary of the signing of the Molotov-Ribbentrop Pact.
• Georgia (2010) Day of Remembrance for Victims of Totalitarian Regimes
• Germany (2009) Day of Remembrance for Victims of Stalinism and Nazism
• Hungary (2011) Day of Remembrance for Victims of Stalinism and Nazism
• Latvia (2009) Day of Remembrance for Victims of Stalinism and Nazism
• Lithuania (2009) Renamed “Black Ribbon Day” (23 August) to “European Day of Remembrance for Victims of Stalinism and Nazism and Day of the Baltic Way”
• Poland (2011) Day of Remembrance for Victims of Stalinism and Nazism
• Romania (2011) Day of Remembrance for Victims of Stalinism and Nazism
• Slovenia (2012) Day of Remembrance for Victims of Stalinism and Nazism
• Sweden (2008) First country to official observe August 23rd as The International Day of Remembrance for Victims of Stalinism and Nazism
• The United States (2014)
  In 2013, Congressman John Shimkus introduced the resolution “H.Res. 302: Expressing support for designation of August 23 as Black Ribbon Day to recognize the victims of Soviet Communist and Nazi regimes.” On 21 May 2014, the United States Congress adopted a resolution supporting “the designation of Black Ribbon Day to recognize the victims of Soviet Communist and Nazi regimes”.

Estonian Memorial for The Victims of Communism