I was worried that these believers might get their timing wrong, because they probably think that the 21st May is timed for the USA. After all, most Americans are baffled to find that NZ dollars don't have George Washington on them, so they are bound to be US-focussed with the date of their raising to Heaven. I'd hate them to be late for lift-off, so I thought I'd email the web site asking for advice.
Here's my email: I'll post any follow-up here. Watch this space.