Multiple choice general knowledge Find the odd one out.. 29th February 2000 29th April 1998 31st June 1999 31st August 1997 Reveal answer Fill a bubble to check yourself C Correct answer Explanation 31st June 1999 is the odd one out because June never has 31 days - it only has 30 days. The other dates are valid: February 29, 2000 was a leap year, April has 30 days, and August has 31 days. This date is impossible.