The basics

Wikipedia definition:

The Gathering (abbreviated as "TG" for short) is the second largest computer party in the world (second to DreamHack). It is held annually in Vikingskipet Olympic Arena in Hamar, Norway, and lasts for five consecutive days (starting on the Wednesday in Easter each year). Every year, TG attracts more than ~5200 (mostly young) people, and the demand seems to be increasing with every passing year. The Gathering currently holds the World Record for fastest Internet connection; 200 Gbits per second.