Almost certainly folklore, then. Probably the product of someone with 50 years’ experience, comprising the same year over and over again.
I remember being over the middle of the Simpson Desert on Melbourne Cup day a few years ago and someone broadcast the name of the winning horse on 121.5. I told my friends in the cockpit the name of the winning horse. I’ll hand myself into police. (I hope the criminal that mis-used 121.5 hands himself in as well.)