What is significant about the fact that the Holocaust took place over a 12-year time period?

The 12 year period signifies the prosecution and murder of Jews by the Nazis regime and it's collaborators between the year 1933 to 1945.

Explanation:

Most Holocaust historians called the  Holocaust as the genocide  carried out  on European Jews by Nazi Germany and its perpetrators from the year 1941 and 1945.

According to Michael Gray who is a specialist in Holocaust Education, he acknowledges three significant of the Holocaust that took place over a 12 year period

The Murder and trial carried out by the Nazis and their perpetrators towards the of Jews by the Nazis in year 1933 to 1945  The organized mass murder of the Jews by the Nazi authorities and its perpetrators in the  1941 to 1945,  this also excludes  victims before 1941 that were murdered. The  trial and murder of different  groups by the Nazi authorities  and its perpetrators from the year 1933 to  1945, which included  victims of  Nazis' .this also signify the annihilation of the Jews.

Several different things make up a culture like, how the people worship, their form of government, geography, and trade. religion is one of the most important things to a culture, it defines peoples life. their different beliefs form into festivities and events that merge with their culture. people that practice hinduism see cows as gods, so no doubt they would celebrate cows, and these celebrations would definitely merge with their culture. those that are buddhist live life trying to reach a certain level of peace, so no doubt would they change things in their life in order to correspond with their religion.