In the US we usually specify what the athletic event will be. 'Athletic meet' and 'school sports meet' are too vague. Here are some examples of common usage for athletic events:
* The baseball game with Central High School will begin at 5:30 PM tomorrow.
* Be sure to arrive early for the football game because it will be crowded.
* The swim meet for teams in the Northern League will be at University Pool on Saturday.
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