The calendar may look a bit different than you're used to, but nothing's really changed.
For starters, the selection of state / month / year / area code now happens off to the left -- bringing it in line with similar navigation in the rest of the site. The left navigation is not used when printing calendars, so they will still run the full width of the page.
The bigger change is that we no longer display all the listings from past dates, at least not by default. That is, if today is the 5th of the month, the entries up through the fourth will be omitted, replaced with an ellipsis "...". Click on the ellipsis to reveal all listings for the month, including those that have already passed.
As alway, feedback is appreciated.