In plain English
It points to the closing moment, not the whole span. Up to that date and time, the thing can be accessed or used. After that moment, its available period has ended.
In context
Here, it names the date and time when the period for accessing or using the assignment ends.
- Situation
- Submitting assignments, reading rubrics, grades, feedback, and resubmission rules
- What it communicates
- names the field for when access or submission closes
Meaning limits
By itself, the term does not say how long the item was available before that ending point.
Examples
“The map is available until 10 p.m. tonight; before then, hikers can save a copy.”
“Because the assignment is available until Monday at 3 p.m., the student will finish the last problem on Sunday.”