In OTL the Germans surrendered in May 1945 (before the US could use the bomb on them). Some months later the US drops two bombs on Japan (Hiroshima and Nagasaki), forcing their surrender in September 1945.
How could it have come to pass where the Japanese Empire surrendered some time in in the first half of 1945 before the US develops the bomb, while Germany surrenders in the second half due to the US use of Atomic Weapons?
EDIT: Also, where in Germany would the bombs be used? And the after effects of TTLs WWII?