“With something so highly perishable, it’s a very zen thing, to carve a pumpkin knowing that it might not last as long as it took you to make it.” “The typical jack-o’-lantern normally has a three-day life expectancy at best,” said Marc Evan, co-founder of Maniac Pumpkin Carvers in Brooklyn, New York, in a phone interview. Like the ghouls and ghosts who spook us every Halloween, jack-o’-lanterns-so tempting to tiny predators and susceptible to mold and rot-are not really meant for this earthly plane.