"The US Congress established Days of Remembrance as the nation’s annual commemoration of the Holocaust. The Museum is responsible for leading the nation in observing Days of Remembrance and for encouraging observances throughout the United States. Days of Remembrance will be commemorated on Thursday, April 8, 2021. Observances and remembrance activities will occur nationwide between Sunday, April 4, and Sunday, April 11."
"The internationally recognized date for Holocaust Remembrance Day corresponds to the 27th day of Nisan on the Hebrew calendar. It marks the anniversary of the Warsaw Ghetto Uprising."
Text from: https://www.ushmm.org/remember/days-of-remembrance