Premise: The 1947 KLM Douglas DC-3 Copenhagen accident was the crash of a KLM Royal Dutch Airlines flight from Amsterdam to Stockholm via Copenhagen on 26 January. The accident occurred shortly after the Douglas DC-3 took off from Kastrup in Denmark. All 22 passengers and crew on board were killed in the accident.
Hypothesis: The 1947 KLM Douglas DC-3 Copenhagen accident took place in the first month of the year.