From http://www.pdxwerewolf.com/links/dwwd (and for it to be saved here for posterity since that site is going to close soon):

"Draw a Werewolf Day (on Twitter as #DrawAWerewolfDay) will be hosted on the date of the full moon in the United States, as listed in the NASA Eclipse Web Site in Pacific Time Zone. On the Draw a Werewolf Day, you may present a werewolf-themed drawing and post it on Twitter using the #DrawAWerewolfDay hash tag. This is not a contest for a prize. This event is just for everyone at any ability to draw something werewolfy for fun!

A hat tip and thanks to @Werewolfnews for the suggestion!

Please note that some websites may choose to embed Twitter tweets with images on their website. PDX Werewolf will only present art that is considered clean in an embedded feed.
When will the Draw a Werewolf Day be hosted?"

Friday, February 14, 2014
Sunday, March 16, 2014
Monday, April 14, 2014
Wednesday, May 14, 2014
Thursday, June 12, 2014
Saturday, July 12, 2014
Sunday, August 10, 2014
Monday, September 08, 2014
Wednesday, October 08, 2014
Thursday, November 06, 2014
Saturday, December 06, 2014
Sunday, January 04, 2015
Tuesday, February 03, 2015
Thursday, March 05, 2015
Saturday, April 04, 2015
Sunday, May 03, 2015
Tuesday, June 02, 2015
Wednesday, July 01, 2015
Friday, July 31, 2015
Saturday, August 29, 2015
Sunday, September 27, 2015
Tuesday, October 27, 2015
Wednesday, November 25, 2015
Friday, December 25, 2015