International Holocaust Remembrance Day : January 27
Designated by the United Nations for the anniversary of the liberation of Auschwitz-Birkenau.
Formally known as Yom Ha-Shoah Ve-Hagevurah, or Holocaust Martyrs' and Heroes' Remembrance Day, designated by the Israeli parliament in 1951 for the 27th of Nisan on the Hebrew calendar.
Warsaw Ghetto Uprising : April 19, 1943
The best-known of many Jewish uprisings against the Nazis, commemorated annually.
Other dates: As shown in the example from the Wielun yizkor book here, remembrance events for specific communities may take place on or around the anniversary of a mass murder.
Pictured: "Attention, Jews of Wielun and area. On Tuesday, August 19, 1946, at the headquarters of the Jewish Committee in Markfredwitz [displaced persons camp], there will be a remembrance event dedicated to marking the 5th yortsayt [death anniversary] of the fallen martyrs of Wielun and area. All surviving Jews from Wielun and area are invited to participate. The Wielun Committee". Sefer zikaron li-ḳehilat Veyelun, p. 386.
Worldwide Virtual Name-Reading (Yad Vashem)
Yom HaShoah Holocaust Remembrance Online Event (Greater Austin Holocaust Education And Remembrance Committee)
New York's Annual Gathering of Remembrance: Virtual Presentation (Museum of Jewish Heritage)
Letters to Sala: A Holocaust Commemoration (Ann Kirschner, Jill Wexler, and special guests)
Warsaw Ghetto Uprising Campaign (POLIN Museum, Warsaw, Poland)
77th Warsaw Ghetto Uprising Commemoration (Jewish Labor Bund, Melbourne, Australia)
77th Warsaw Ghetto Uprising Anniversary (Congress for Jewish Culture, New York, NY)
Looking for more events in your local community? Visit the Association of Holocaust Organizations' website to find an organization near you.