Tip: prevent the form being filled after a certain date, even if offline

Have a note with text like "Submissions for this form are no longer being accepted" with relevance and constraint that compare the system date to a date in the future.

Beware of timezones and of devices that are set to the wrong time.

This also pairs nicely with enabling device-based edits and stopping them on a certain date or even after a certain amount of time has passed.

https://forum.getodk.org/t/odk-collect-v2025-2-beta-edit-finalized-sent-forms-mdm-configuration-android-15-support/54254/12?u=ln

Start by locating the documentation for form notes, relevance, and constraint expressions that compare the system date with a future date. Document how to prevent submissions while offline, including timezone and incorrect-device-clock caveats, and cover the related device-based edit cutoff behavior. Done means users can find clear guidance and understand the limitations.

Written by the indexing model from the issue text.