Walk through a dozen Shopify or WooCommerce stores on a Saturday morning and you will see the same thing on most of them: a bright bar across the top of the screen counting down to the end of a sale. Two days, eleven hours, forty-two minutes, eighteen seconds. Seventeen. Sixteen. For a sighted shopper this is just visual noise. You glance, you understand, you keep scrolling. For a screen reader user, a low-vision user with screen magnification, or a customer with a cognitive disability, that same widget is one of the most disruptive elements on the page. In some cases it makes the rest of the site unusable. In a few of the audits I have run this year, the countdown timer was the single biggest accessibility issue on an otherwise reasonable store -- and the owner had no idea, because they had never tested the page with the assistive technology that real customers use. Memorial Day, Father's Day, the summer sale season, Prime Day, Black Friday.…