2020-2021 USACO Contest Dates 01/05/202104/25/2021 Ascend E Learning USACO 2020-2021 Contest Dates Dec 18-21: First ContestJan 22-25: Second ContestFeb 26-Mar 1: Third ContestApr 2-5: US OpenTBD (Late May): Training CampJun 20-27: IOI 2021 in Singapore Mark Your Dates and Get Ready!