[Updated] 12th Anniversary GM Events: 4/10 – 5/7

Problably because there is almost no GM in Luna, so they can't make a event with a diferent time.

"We have GMs patrolling 24/7"

Regardless, they go to these events especially, it's not part of their usual presence (or lack thereof).

And, see, they moved it. It was just a case of not thinking about the users. But once someone on the forums pointed out the absurdity, like magic the event for Luna got moved.