You may have to wait a few months for the end of the world, but you only have to wait two days to learn when Jesus "

"

Beginning Monday, 20 billboards that suggest Jesus will return to earth on May 21, 2011 (spoiler alert!) will go up along surface streets in Metro Detroit,

. The ads include a biblical excerpt from Ecclesiastes: "...a wise man's heart discerneth

both

time and judgment."

Allison Warden of We Can Know, a North Carolina-based group that is funding the campaign along with Family Radio and private donors,

the billboards will appear in several U.S. cities where Family Radio is not broadcast.

Family Radio spokesman Tom Evans explained the groups' message to the World-Herald in Omaha, where the billboards already have started popping up, clarifying that "this is not a joke."

So, yeah. The guy who made this billboard-worthy prediction previously guessed wrong, so you may not want to abandoned all your worldly possessions or anything. But as even atheists would acknowledge, it couldn't hurt to try to be a better person.

Last September, the Wisconsin-based Freedom From Religion Foundation paid for a series of billboards asking Metro Detroit to "

" and "evolve beyond belief." Those ads, along with

, sparked a minor local controversy.

Update: This entry previously mentioned May 11 -- as opposed to May 21 -- as the date the group says Jesus will return. Please adjust your plans accordingly.