I Need Help With My Math!

Here's today's Web Waster:

TravelWisconsin - The first day of Autumn isn't until September 23rd, but it's never too early to start planning for your drive to check out the beautiful colors.  Last year I sent you to the Fall Color Report a little late, so I wanted to get a jump on it this year.  Now you can bookmark it, and check it out when the Fall colors are full and vibrant.