Calculate number of days between 2 dates & then assign a number based on the answer

So strange! The date in cell B2 here is formatted as a date. I formatted both A2 and B2 as a date when I made the spreadsheet and C2 as General. No screenshots, but I'm sure you'll take my word for it. I selected B2, double-clicked, hit Enter, and still got nothing. How strange! Can you save the working spreadsheet and attach it to a reply? Thanks for your help.