neither the start nor the end have a clearly defined date
America fought Germany for the end of the Holocaust, you can learn more if you research more about the Holocaust end and WW2.
the star of david
The Holocaust
Jesse Owens (the star American athlete) was not held in Germany and it was not during the Holocaust.
You could argue that the Holocaust was the start of the modernity.
no doubt, the end of the Holocaust.
The UN did not exist at the time. For the rest of the answer see the related question: How did the Holocaust end?
The Holocaust ended May 8, 1945 which is around spring.
The Jews of Europe, during the holocaust.
The Jews were forced to wear that during the Holocaust.
The yellow Star of David.
The defeat and unconditional surrender of Nazi Germany in May 1945: there were no mysterious circumstances surrounding the end of the Holocaust.