Yuletide is a secret-santa style gift exchange for fics in small fandoms. It was first held in 2003 by founders astolat and tsikeh. The first Yuletide attracted 300 participants; now, participants number in the thousands.
Yuletides by YearEdit
“Every year each participant requests fics in 3-4 fandoms but are guaranteed only one request...New Year's Resolutions
“Between Yuletide's inaugural year of 2003 through 2009, Yuletide stories were hosted on the...Official Yuletide Website
“Yuletide has two official communities. Yuletide: The main Yuletide community. The community...Yuletide Livejournal
“Yuletide 2011 was hosted, for the third year in a row, as a Yuletide subcollection on Archive of...Yuletide 2011