I had found some pages online that have "days since" calculators but they were generally full unrelated text and ads. Plus the type was so small.
You can click the image should you want to use this calculator.
So I created my own little app. Really it is an html file that opens in a browser window. Along with links to frequently used Zazzle related pages, it is a handy little tool that can sit off to the side in a separate small window out of the way.
the clutter and mouse type.
Although it is a file on my computer, it bookmarks just like any web page.
If you would like to use it or learn more you can go here. We put it up at 99¢ (We have to pay the rent on our virtual space and every little bit helps). It is an easy downloadable zip file that includes a short READ ME text document.