https://twitter.com/FF_XIV_EN/status...6gnlXYObj8r9yw
Probably gonna be August 22nd if you go by maintenance days.
Relic questline starts in 6.25 and will be tied to the Hildebrand questline which imo is really dumb.
The second tier of Pandemonium will have it's savage version delayed by one week. This is different than how the 2nd and 3rd tiers are normally released but it's a test run to see if players like this release schedule instead. Spoiler: some WF racers don't like it lol.