Happy Halloween!

Participants wearing zombie makeup perform during a Halloween event at Tokyo Tower in Tokyo, Oct. 31, 2013.

Participants wearing costumes and make-up as zombies wait for a train at a subway station after a Halloween event to promote the U.S. TV series "The Walking Dead" in Tokyo, Oct. 31, 2013.

The South Portico of the White House in Washington decorated and lit in orange lights for Halloween, Oct. 30, 2013.

People wear ghost costumes as they join a Halloween Parade in Marikina city, east of Manila, Philippines, Oct. 30, 2013.

Sydney Muslim community leader Jamal Rifi, center, and his family members pray at a makeshift memorial after a siege at Martin Place in the central business district of Sydney, Australia Tuesday, Dec. 16, 2014.

A baboon eats a Halloween pumpkin at the Hagenbeck Zoo in Hamburg, northern Germany, Oct. 29, 2013.

A diver in a skeleton costume dives during a media opportunity to mark Halloween at the Sea Life aquarium in Berlin, Oct. 28, 2013.

Children dressed in costumes take part in Manila's Ocean Park annual Trick or Treat event, Philippines.

Marius Petrulis, 35, competes dressed as a chicken in the ZJ Boarding House Halloween Surf Contest in Santa Monica, California, Oct. 26, 2013.