Global Accessibility Awareness Day is on May 21 this year. It is the third Thursday in May, the way it always has been since 2012, and it is the one day a year when the entire web -- developers, designers, regulators, journalists, even the people at the platforms you depend on -- pays attention to whether websites work for people with disabilities. For a small-business owner, GAAD is awkward. The big tech companies post their accessibility highlight reels. Government agencies announce new compliance deadlines. The big agencies publish their pricey audit packages. And you, the person running a five-person business with one part-time web person, are left wondering whether you are supposed to do something, and if so, what. Here is what you are supposed to do: something. Anything. The goal is not to fix everything before May 21. The goal is to use the week as a focusing event -- a reason to spend a few hours on a topic you have been deferring all year.…