Well, this weekend, I was playing around with Codepen.io and found the coolest button ever - you mouse over and it flips down. I thought, it would be the coolest thing to use it to popup one of our opt-in calendar modals. Check it out below ...
I also decided to do a version that is a bit more mobile friendly over at JSFiddle.net ... here's the link.
And finally, click on the screen cap below for a landing page view (without all the distractions around it).
Feel free to grab the code, or fork it and create your own version. We love to see new designs, so if you do something really cool, put the link in the comments so we can check it out!