OK so I was looking at the December events and all the cool stuff. But one event caught my eye

I was super excited for this cause I would be able to get a new 6*. And then the day finally comes and I look in arenas and what do I see?? I see bleeping five star and four star shards. Tell me where in the post did it say the arena was linked to progression huh?? Absolutely nowhere.
Another thing the post also said that the calendar would start the 10th of December instead it started at 00:01 December 11th. you could've specified