I plan to brew 5/21. I might be brewing on 5/22 also, depending on how much I brew today and tomorrow. The rapture? Hilarious. But if there is some natural disaster I will either be cleaning up or doing whatever I would have done otherwise, but also listening to the news.
Remember, the prediction* is for rolling earthquakes at 6PM local time, where ever you happen to be. My brother in law is in Jakarta, so he'll let me know what happens. Then we'll have time to get ready.
*By "prediction" I mean made up nonsense.