Halloween 2013
From The Wajas Wiki
For Halloween 2013 (like Halloween 2012, Halloween 2011, and Halloween 2010 before it) the Obsessed Waja Fan gave out treats to wajans who came to her door while the lights were on (once every 60 minutes). You would simply click "Trick or Treat" and the OWF would give you a random item from the pool of possible items.
The event started on October 26th, 2013 at midnight wajas time, and ended October 31st at 11:59pm.