Even if there isn't a set time, knowing that at some point in the year a world would reset would be great news. Something as simple as "A reset will happen something every spring" would work in my opinion. Me and my group of 10-15 players have been on standby for the past few months for a world reset, we enjoy the game from the start and progress until we can't anymore, and just chill in our hubs until the joy of the game dies down and people leave until next world.
I believe that we are not the only small group that feels this way, we enjoy the grind, especially early on, and after the first 3-4 months it dies and people start to leave none of us will have the motivation to play until a new world reset happens. An ongoing world it just unappetizing the longer it has been up.