Built, waiting on review: https://github.com/gulkily/v3/pull/71
Today's square gets a ring and a bold day number. When neither month on screen has today in it, a Today link shows up between Earlier and Later and takes you there.
"Today" is your own date, not the server's. You posted at 10:42 pm New York time, when UTC had already rolled over to Nov 8, so going by UTC would have ringed the wrong day.
Not live until it's merged and deployed.