Hi, thank you for making such a creative and much needed resource!
In case it helps w/fixing future dates issue and updating this plugin to work in 3.8, Same problem re: being unable to select future dates in WordPress version 3.8.
Instead of missing arrows to move to future months, the version I just downloaded (1/9/14) shows a non-traveling link (does nothing when you click it) to select a date. No arrows, fields nor pop-up calendars to select dates in Chrome or Firefox (PC) after clearing cache (see screenshot if it helps).
Screenshot: http://postimg.org/image/f89ycwk6f/
It creates events, assigning them all today’s date by default. When I click edit to assign it a future date, the select date buttons are still missing.