Writing Prompt - Radio From the Future

I'm sitting here early in the morning listening to the radio and it has me thinking. What if your character turned on the radio and the station they were listening to was from the future? How long would it take for them to realize it was from the future? How would they figure that out? Would the radio report a fire or natural disaster before it happened? Maybe the results of a sports game before it was played? What would the character do with the information they get from the radio? Would they save lives or make money? Would they tell anyone about it?