Riddle: If Friday the horse goes into the park at 7:00 and on Sunday the horse goes into the park at 8:00 what is the horse's name?
Answer: Friday.
Source: https://www.riddles.com/index.php/2820
If Friday the horse goes into the park at 7:00 and on Sunday the horse goes into the park at 8:00 by Gaga Riddle