Q: Generate a correct and concise answer for the question based on the words in the context.
Context : The 1958 Syerston Avro Vulcan crash was a military aviation accident that occurred in England on 20 September 1958 during an air show at RAF Syerston, Nottinghamshire when a prototype Avro Vulcan bomber crashed.
Question : The point in time of 1958 Syerston Avro Vulcan crash was what?
A:
20 September 1958