Thread:CoinsCP/@comment-25255743-20150517135714/@comment-3263817-20150517183115

Someone on the Toonzone forums mentioned it in a post on the International News thread for Cartoon Network Netherlands' July lineup.

It's listed under "special events":
 * "The Nixels will take over Cartoon Network on the 25th and 26th of July from 12:40 till 18:00, with random episodes of random shows (s.a. Courage) and Mixel shorts in between!"

Actually, I think they just recently added that last part, which I didn't see the first time I read it.