Acme wrote: And I use the drop down menus every time I visit.

Which is perhaps why you thought it was of no consequence. I always call up the site from a bookmark so I would have to go through an extra step to get one day's worth. And I'm mainly using a tablet on which the pull-down menu is very inconvenient - I have to zoom in first. I don't leave tabs open for long on a tablet. I see that Backwoodsman is also using tablet computers.

So I now always see three days. And that's OK. I'm happy with Joe's explanation. I always did think one day was a bit short.