NFL on Christmas Day
For most of the NFL's history, Wednesdays have been off limits. The NFL has been looking for opportunities for teams to put on their NFL jerseys and play on Wednesdays, and this season with Christmas falling on a Wednesday, the NFL found its chance. The league had four teams play on a Saturday in Week 16 and then switch opponents on Christmas Day.
When the Kansas City Chiefs vs the Pittsburgh Steelers and the Baltimore Ravens vs the Houston Texans, that who play in their Kansas City Chiefs football jersey will double the amount of games the NFL has played on a Wednesday since 1948.
After that, the NFL stopped avoiding games on Christmas, though if the holiday falls on a Sunday the NFL will shift the majority of its games to Saturday. That's what makes this year's games unique, It seems like it will happen again in 2030, the next time Christmas falls on a Wednesday.