Passage: The first production B-45 flew in February 1948, and the Air Force took delivery of 22 B-45s in April 1948. Powered by J35 turbojets and not considered combat-ready, they were assigned to training duties and to conduct various test programs. The next batch were powered by the more powerful J47 turbojets. The first B-45As entered service in November 1948 with the 47th Bombardment Group, and the initial order of 96 was completed in March 1950.

Question: When did the first B-45A's enter service?
November 1948