Most NFL games are played on Sundays, with a Monday night game typically held at least once a week and Thursday night games occurring on most weeks as well. NFL games are not normally played on Fridays or Saturdays until late in the regular season, as federal law prohibits professional football leagues from competing with college or high school football. Because high school and college teams typically play games on Friday and Saturday, respectively, the NFL cannot hold games on those days until the Friday before the third Saturday in December. While Saturday games late in the season are common, the league rarely holds Friday games, the most recent one being on Christmas Day in 2020. NFL games are rarely scheduled for Tuesday or Wednesday, and those days have only been used three times since 1948: in 2010, when a Sunday game was rescheduled to Tuesday due to a blizzard, in 2012, when the Kickoff game was moved from Thursday to Wednesday to avoid conflict with the Democratic National Convention, and in 2020, when a game was postponed from Sunday to Tuesday due to players testing positive for COVID-19.