They sent a message in-game, let a message on twitter and made a post about it here. They explicitly said the starting time (13 hours GMT)
I don’t why we would need more it’s already enough. And they probably can’t announce return time because :
- They probably don’t know how many time it will take (unexpected bug, etc…)
- If they give a deadline, people will be mad if they take longer than what they said (can happen for whatever reason)
- If they take account of it and give a long frame like 6 hours window it will be disappointing.
All we know is that they told us the start time within multiple supports (good point) and they said it should be a short maintenance break. I expect 1-2 hours max. let’s hope the shortest (but more important the best)