If I really thought that a child was ready, I would begin dropping hints. "Wow, she doesn't like to have a wet/smelly diaper these days, huh? Good news for the potty!" I don't think I would outright say "it's time". I want mom and dad to take the lead on this one, and not just allow me to do all their dirty work for them!! It would depend a bit on the child and my relationship with the parents.
Always ensure that your child receives quality care by taking the time to investigate the provider and by asking for references! We simply cannot verify the claims of every daycare provider.
Updates
We expect providers to keep their listing and available openings up-to-date. However, to prevent oversights, openings expire after 45 days.