So my school was supposed to pay me on the 27th (As it is stated in the contract)

They are now a day late. My school has been pretty on time with everything else and I'm not too worried that I will never get payed. My question is however, should I say something? I know I'll get payed by the end of the week so is it worth saying something. Also does not paying me on the day that is written in the contract considered a breach of contract? Cause I know there is a penalty amount for breach stated in the contract as well.