comark/quiz/invalid-closes · Write a poll's closes as an ISO date

A poll closes after its closes date, read as an ISO date such as 2026-11-30 or 2026-11-30T18:00:00Z. A value that isn't one is ignored, so the poll stays open.

Incorrect

::poll{#next-lesson closes="end of November"}
What should the next lesson cover?

- [ ] Web Workers
- [ ] Streams
::

lint-comark example.mdexample.md:1:1 comark/quiz/invalid-closes::poll 1 (#next-lesson): closes "end of November" isn't a date, so the poll never closes.Write an ISO date, as in closes="2026-11-01".✖ 1 problem

Correct

::poll{#next-lesson closes="2026-11-30"}
What should the next lesson cover?

- [ ] Web Workers
- [ ] Streams
::

lint-comark example.md✔ No problems