Angry Birds Seasons

Angry Birds Seasons (formerly known as Angry Birds Halloween) is the second game in the Angry Birds series, which contains episodes based around real-world holidays. It's available on five platforms: iOS, Android, webOS, Symbian^3, and Windows Phone 7. Rovio has also stated PC and Mac versions are coming soon. Seasons was initially released as Angry Birds Halloween to in October 2010, and the name was changed in December to Angry Birds Seasons with the Christmas episode. Updates continued throughout the first half of 2011, and are listed below.

On August 23, 2011, the Mighty Eagle was released for the game. Seasons is updated on a semi-monthly basis, each update adding a themed episode stylized by an upcoming holiday, and usually two, Golden Eggs. (Easter Eggs has 10, a rare exception). Angry Birds Seasons split into two packages, Seasons 2011 and Seasons 2012.
 * Trick or Treat - Halloween, October 21st, 2010
 * Season's Greedings - Christmas, December 1st, 2010
 * Hogs and Kisses - Valentine's Day, February 7th, 2011
 * Go Green, Get Lucky - St. Patricks Day, March 10th, 2011
 * Easter Eggs - Easter, April 18th, 2011
 * Summer Pignic - Summer, June 21st, 2011
 * Mooncake Festival - Moon Festival, September 1st, 2011
 * Ham'o'ween - Halloween, October 21, 2011
 * Christmas 2011 - December 1, 2011

Trivia

 * When the player completely beats an episode (getting all 3 stars on all levels and completeld all golden eggs), the item representing the holiday will have a golden star on it on the main menu. (Ex: when Easter Eggs is completely finished, all flying easter eggs on title screen will have golden stars on them.