The annual Ludum Dare will begin in the wee hours of this evening and in multiple time zone to boot. Founded by Geoff Howland, and running since 2002, Ludum Dare challenges developers of all skill levels to make a game in 72 hours. Since its launch the community has run more than 22 regular events, and has collectively created thousands of games.
Ludum Dare 2014 takes place April 25th - 28th. Ludum Dare is an accelerated game development event where participants develop games from scratch in a weekend, based on a theme suggested by community. That theme is usually revealed right before the development jam begins. For more details - including how to get involved - check out www.ludumdare.com.
While the event is typically an online affair, there are plenty of real-world gatherings too. Real world gatherings can be found in Portland, Oregon; Longmont, Colorado; Brazil; Paris, France; Lund, Sweden; San Francisco, California; Falmouth, UK; Minsk, Belarus; Lausanne, Switzerland; Enschede, Netherlands; Richmond, Virginia; Aarhus, Denmark; Mannheim, Germany; Los Angeles, California; Omsk, Russia; Knoxville, Tennessee; Adelaide, Australia; Hamburg, Germany; Johannesburg, South Africa; Charlotte, North Carolina; Lexington, Kentucky; Rochester, New York; Coventry, United Kingdom; Bandung, Indonesia; Brisbane, Australia; Miðfjörður, Iceland; Chicago, Illinois; Skopje, Macedonia; Eugene, Oregon; Oslo, Norway; and Tokyo, Japan.
For more information on specific locations check out this link.