Forever also sports a custom design for a new widget we call Milestone. You can find it in your blog dashboard at Appearance → Widgets and it’s pretty easy to use. Just pick a title for your event, a date and time, and a special message for the big day, and you’re ready to go. Now you have a special save the date widget for your Wedding on every page of your blog. via Get Married With WordPress — Blog — WordPress.com.
But wait there’s more in the comment section. The new Milestome widgets is available for every theme on WordPress.com

How fun! I love it.
I think it’s cool too. :)
Rats. I’ve been waiting for a Millstone Widget… : )
You have been waiting for a grain grinding widget! Who knew? ;)
Interesting :)
I thought so too.
Argh – having a heck of a time getting this to display correctly. Must have something wrong in my general settings but i’ll be hosed if I can figure out what…
Please post to the support forum for help http://en.forums.wordpress.com
See, I am lost! Will do, thanks.