My job has, twice now, 30 minutes before close told us we have to stay an extra 30 minutes past close to “make the store look pretty”. Namely, on Mothers Day and Labor Day. Is this legal, with such short notice?

So, exactly as the title says. 30 minutes before close, on Mothers Day, on some random Sunday I don’t remember, and last Labor Day was the third time, our assistant General Manager comes over the radio and says we all are staying another 30 minutes past close, no one can leave before. This has been a problem for obvious reasons, especially on National holidays. People get rides from others, have plans, have life outside of work. I’m an hourly worker, so I’m still getting paid the extra time, but it’s so disrespectful without actually scheduling us or telling us until 30 minutes before. Anything I can do besides update my resume and just, not staying?