Well... it's 10 before midnight here. I'm pretty sure a bit east from me it's the 30th already. Not so much in the west. But I don't know where lemm.ee was located.
Ah. My instance reports the last activity from lemm.ee from 45mins ago... So that'd be June 30th, 00:14 Estonian time. And the main page forwards to join-lemmy.org now. Looks like the shutdown to me.