Does "up to [date]" include the end date? What about date ranges ("the week of...")? [duplicate]
Solution 1:
I would expect up to to include the end point. If you climbed up to the tree house, I would expect you to be in the tree house or at least at that level.
As another example, if told "Sum all the positive whole numbers up to 5", I would do 1+2+3+4+5=15.
Solution 2:
Up to means up to the point of but not beyond. However, it is sometimes used (in my opinion incorrectly) to mean up to and including. I believe that technically, up to means <, and through means <=.
That said, I think you should definitely study the material through October 6.