We have a high school program here that is private and run by a University and follows University schedule. They start the week of labour day, have a fall "reading week" around US columbus day (canadian thanksgiving), do exams for first semester first two weeks of December, go back in first week of January have another reading week in mid February the students all call in Spring break, then a extended "weekend" around easter. They are now done classes for the year.
Since I learned of this program here I have realized that school calendars are nit so cookie cutter.
I hope the original poster enjoys her trip!