If you mean on russia then it was on June 1941
Operation Barbarossa, June 22, 1941
On June 22, 1941. Source below-
It sounds as if you are thinking of his attack on the Soviet Union in June 1941.
USSR
In June 1941.
Hi
June 22 1941. It was Stalins fault for not noticing it was coming for ignoring his Intel agents about German activity and Hitler started a surprise attack against Russia.
Hitler did invade the USSR on 22 June 1941.
June 22nd 1941
He invaded Russia 22 June 1941 .
22 June 1941 : Hitler moves East to conquer Russia starting with Operation Barbarossa .