Friday, January 25, 2013 : Competition launch: training set and validation sets released Wednesday, April 3, 2013 : Deadline to submit predictions on the validation set, public leaderboard frozen. Thursday, April 4, 2013 : Validation set solutions released. You may retrain your models on the combined training and validation sets at this point. Wednesday, April 10, 2013 : Deadline to upload final models. You only need to upload a model to be eligible for prize money (we recommend this if you are in the top 20 or think you have a shot for the prize money). Thursday, April 11, 2013 : Test set released. You now have one week to make predictions on this set and submit your predictions to Kaggle. You don't need to have uploaded a model to make your test set predictions and appear on the final leaderboard. Wednesday, April 17, 2013 : Deadline for submitting test set predictions.