Your manager should post a schedule on Monday, maybe Tuesday if they're late, for the week starting two weeks in the future. (A week is Monday-Sunday.) So for example, right now you should have a schedule through October 24. On Monday, you'll get your schedule for Oct 25-31. A week from Monday, on Oct 18, you'll get your schedule for Nov 1-7. So you always know your schedule at least 2 weeks from a given day.
Make sure to get the Partner Hours app so you can see your schedule and request time off. Find the download instructions by logging into
$1, searching "app quick reference" and clicking the first result. You can also log into the web version
$1.
(This is all if you're in a corporate store, if you're licensed it's probably different)