Emerson, Lake & Palmer may have performed on this day in 1977 at the Tampa Stadium in Tampa, Florida.
This concert, a part of their Works Tour, was originally scheduled for July during the first leg of the tour. However, there is a chance that it was rescheduled near the end of the second leg instead. I have been able to find no material proof this actually happened, unfortunately.
There is no known recording of this particular concert, if it occurred.