The BCBCBCBC was Labor Day weekend, I've done it several times. They've given it a new name, ACACAC Bicycle Tour, and changed the date to Aug. 21.
I'm no longer a member of the CCC so I don't know the reasons for the change.

The CCC does have weekly scheduled rides that run the entire year. It's just the national rides that are early and late season.

At one time the CCC did try national rides in July but the participation was very low. I'm sure I would be very hesitant to come to sw Ohio to ride in July because of the humidity while I wouldn't hestitate to participate in a long ride here in CO.