Timing Adjustable
Time limits set by the content must be adjustable: users must be able to turn off, adjust, or extend any time limit before encountering it.
What it requires
WCAG 2.0 SC 2.2.1 covers session-timeouts, countdown sale offers, time-limited form submissions, and any other timing constraint imposed by the website. Users must be able to turn off the time limit, extend it (at least 10× the default), or be warned with a chance to extend before the limit triggers.
Exemptions: real-time competitive events, time limits essential to the activity (e.g. an auction closing), and time limits longer than 20 hours.
Common Shopify failure
Cart that holds reserved inventory for 5 minutes with no warning before clearing. Flash-sale checkout countdown with no extension option for users who need more time to enter address details.
How to fix it
AccessComply patches cart-timeout flows to surface a warning at 80% of the limit with an "I need more time" extension button, exposed to keyboard and assistive technology.
Primary source: W3C — WCAG 2.0 Understanding 2.2.1