What would you do if you heard the apocalypse was coming?
I wouldn't spend any time trying to enjoy the last days of my life. That seems pointless and indeed counterproductive. It makes much more sense to me to put all of my energy into trying to prevent the apocalypse altogether, or, failing that, at least avoid dying myself.
I mean, who cares if the last two weeks of your life were fun if you still died at the end of them?
All of this is assuming that the whole apocalypse thing has been verified, of course. Otherwise just ignore the silly people who think the world will end.