SkieCan a student change the date and time to stretch a schedule window?
No. Date and time are locked to automatic, with auto time and auto time zone forced on, and Skie uses a trusted clock for sync timing. So changing the clock does not extend a study window or end a night mode early. This is a default hardening switch.
Schedules depend on time. If a student could set the clock back an hour, a night window might seem to last longer, or a lock-out might appear to end. Skie addresses the problem from two sides.
At the Android level, the date and time settings are locked to automatic. Auto time and auto time zone are forced on, so the manual option is gone. A student cannot set a different date to get around a deadline.
Skie also keeps a trusted clock for sync timing. The device does not rely only on the clock a user could influence when it decides about syncs and gating. That keeps Due, Overdue and Offline unusual states meaningful, because they are measured against a clock the student cannot adjust.
Windows run as set: days, start, end and allowed apps, overnight windows are supported, and the first matching window wins. A hostel night mode with calls allowed, a study block, a break and school hours all use the same machinery, and devices switch between them by themselves.
Practical tip: set your thresholds with some tolerance for normal drift, then watch for devices that are silent for long stretches. Time-based rules work best with a quick sync after the screen turns on, and the product already does that when a device has been offline.