Why do we have to do sports day and not any other academic day subjects at school?

Why do we have to spend a whole day doing sports we may not even like at school? we are expected to have sports day but we dont get to do french day or art day or science day. if people wanted to get fit then they could do it in their own time and own way. most of the time you end up with a spot you hate!
Answer
There is no requirement to have a sports day, but most younger kids enjoy them! lots ofother subjects have national events such as science week, technology week, book day, black history month etc etc, and schools choose to take part, or can organise their own.as for getting fit in their own time, not all kids have access to sporting facilities outside school and with obesity on the increase, unfit kids grow into unfit adults and cost the nhs, and tax-payers, a lot of money!