Many "predictions" made before and/or after a certain day
will always come true unless it falls on that particular
day (being neither before nor after). If a given person is
said to die before May 15 and he dies May 16, then technically,
he died before May 15 of the following year. If a given person
is said to die after May 15 and he dies on May 14, then
technically, he died after May 15 of the preceding year.
So yeah, there's that...