You have to do a lot of budgeting both for summer holidays and new academic year.
Holidays/break from normal routines and environment is good for everyone's mental health - particularly if you are a single parent with low income, etc.
You want your children to have fun during holidays too and so you plan a holiday getaway (a budget one with almost no meals out). After you are back from your summer break, you make a list of things for the new academic year - uniforms, shoes, etc. Yes, all this can make you stressed and worried.