Programming Contest Calendar
All times are in GMT/UTC unless noted otherwise.
 Short-term Contests
CodeChef CookOff: CodeChef's periodic monthly contest happens on the second last Sunday of every month at www.codechef.com/COOKXY (replace XY by a 2 digit number). It is an ACM ICPC styled contest. The contest is open for all. There are 5 algorithmic problems for solving in 2.5 hours. The top 10 participants win a goodie (tee-shirt/sipper/pen-drive).
CodeChef LunchTime: CodeChef's periodic monthly contest happens on the last Sunday of every month at www.codechef.com/LTIMEXY (replace XY by a 2 digit number). This is an IOI style contest. This means that the problems are partially graded. You get score for passing certain test data. The contest is open for all. There are 4 algorithmic problems for solving in 3 hours. The top 10 participants from school win a CodeChef goodie (tee-shirt/sipper/pen-drive) and Certificate.
101 Hack. HackerRank's periodic monthly contest that happens every last saturday of the month at www.hackerrank.com/101hack. It is all about speed, efficiency and accuracy. There are 3 interesting challenges to solve in 3 hours.
Guess the Rating, an ML Contest by HackerRank HackerRank presents you one of the finest AI Challenges we have ever hosted. The challenge is to guess the rating of a user from Topcoder, given training data. Come see us on May 25th 10am UTC. Register for the contest here - https://www.hackerrank.com/rating
Online Programming The battle of the Coders kicks off with hordes of programming geeks, ready to pit their coding and logical thinking skills to the test against the best on the battlefield of SPOJ. Compete against some of the most astute programming minds across the world to experience nail-biting tension and the ecstatic joy of coding, at the Online Programming Contest of Kurukshetra. Do you look both ways before crossing a one - way street? Then you are the programmer we are looking for! For details visit : http://kurukshetra.org.in/#!/events/onlineprogramming
 Long-term Contests
CodeChef Long Challenges:
CodeChef's periodic monthly contest starts on the 1st Friday of every month at 3:00 PM and runs over 10 days to cover two weekends at www.codechef.com/MMMYY (MMM => month, YY => year). You can find them here: http://codechef.com/contests. The contest is open for all. There are 9 algorithmic binary problems and 1 challenge problems (optimisation). The top 10 participants globally win a CodeChef goodie (tee-shirt/sipper/pen-drive) while the top 20 participants from India win a CodeChef goodie (tee-shirt/sipper/pen-drive). There is a cash prize as well for top two participants. Know the details here: http://discuss.codechef.com/questions/51999/how-do-i-win-a-codechef-goodie
- now - 20 Apr 2013 16:00: Al Zimmermann's Programming Contests Factorials
HackerRank Monthly Contest
Date/Time: May 31 - June 9
The contest hosts 5 challenges which are progressively harder to solve. You'll have to 'unlock' each problem to view and solve the next one for a chance to win cool prizes!
 Where we get this information
This list is currently being updated manually. A list of pages with schedules and contest announcements can be found on this page.