Battle of Berlin

The Battle of Berlin, designated the Berlin Strategic Offensive Operation by the Soviet Union, was the final major offensive of the European Theatre of WWII. The Battle in Berlin lasted from 20 April until the morning of 2 May.

In Downfall
Except for the Epilogue, Hitler's secretarial interview and the ending, the whole film takes place during this battle, starting with 20 April and finishing on 2 May. There are 4 main battle scenes and several skirmishes.

No aerial attacks are seen, but rather artillery bombardments and Soviet infantry supported by tanks. As the defeat became iminent, the Nazis began to rely more often on civillian soldiers, like Volksstrum and Hitler Youth.

In Downfall Parodies
In Downfall Parodies, the Battle of Berlin did not ended on 2 May, it continues even today. Chuikov's forces besieging the Bunker for several years now. Fearing Hitler's Pencil of Doom, the Soviets are biding their time, having concluded that anyhow, Fegelein's antics are worse than anything they could do the German dictator.