It was just another day in school. We were seated in the lecture hall waiting for the lecturer. Then a classmate, let’s call him Mr T, came in and promised to give us a treat “next year this day”. Some classmates took it for real and told him to honour it when the day came. Mr T smiled and told them to mark it down in the calendar. That was when they realized the whole thing was meant as a joke because that day was 29 February 2000 and 29 February 2001 does not exist.