No, I didn't see a date in the letter, and I didn't know about Jan 31st either. Well, she still has a few hours left .......so who knows?
I'm sure she has a rapture emergency checklist that she goes thru just before the glorious event. You know, things like pay the bills, turn the gas off, bring the washing in, put the cat out, cancel that holiday, kiss everybody goodbye........ad nauseam.
As for what they do after failure to launch, they can always console themselves with a stiff glass of communion wine while recounting all the items they left off their checklists, then breathing a sigh of relief that they got it wrong............again.