This riddle is not really about dates, seasons, or something that happens during a particular month. The clue is hidden inside the spelling of the month names.
Look at the letter E. “June” contains one E. “November” contains two Es. “May” contains no E at all.
Answer: The letter E.
Once you stop thinking about the calendar and start looking at the words themselves, the pattern becomes clear. It is a classic observation riddle that rewards paying attention to the exact wording.


