On the night of 2/3 August 1944, the ‘Gypsy Family Camp’ (The Zigeunerlager) at Auschwitz-Birkenau was liquidated. 2,897 men, women, and children of Roma or Sinti origin were murdered in the gas chambers by Nazi officers. Their bodies were burned in pits.
Of the 23,000 Roma and Sinti people imprisoned within the camp, it is estimated that around 20,000 were ultimately murdered. The anniversary, often referred to as Zigeunernacht, is an opportunity to remember the Roma and Sinti people murdered under the Nazi regime, and is now marked as Roma Genocide Remembrance Day.
The link is taken from
Holocaust Memorial Day trust :https://www.hmd.org.uk/resource/2-august-1944-zigeunernacht-2/