Paul, I have trouble with this as well, but I'm pretty sure it would be about 20 hours from the time of your posting.
It's always seemed to me that posting times are displayed as my local time. Yours was at 8:38 pm, which seems about right because it wasn't there before dinner but is now. So from 8pm tonight til 4pm tomorrow comes in somewhere between your first two estimates.
The only reason I have a chance of figuring this out is because I live here :-)
Now, as I recall, our friend Michael got another new bass sometime within the last year, and in that case Mica actually stopped somewhere on her drive down, and posted a preview picture. I thought that was a bit excessive - I mean, come on now, the guy is going to have it in his hands in just a few more hours, right?
But anyway, congratulations Michael. And while you're waiting, how did you arrive at the precise pickup locations? Is this a matter of playing style and where your hands end up, or based on some complicated string harmonic analysis, or perhaps even just a visual thing? I'm curious.
-Bob