This is NOT an Undokai
The boys' undōkai (運動会, field day) has been postponed by two weeks and is now called a gakunen-betsu taiiku happyōkai (学年別体育発表会) or Presentation of Physical Education Separated by Grades. (Trust me, it sounds marginally better in Japanese.) What would normally be an all day affair under a blazing hot sun will now last about 30 minutes per grade. Win-win.