I am guessing you mean Tuesday, June 24th at 4 pm UTC, 9 am PDT, 12 pm EDT, and 6 pm CEST.
I put it on my calendar, but WWP is launching its re-vamped site at 10:00 EDT that same day. If things go well, no problem. If things go poorly …
(New site is more modern & accessible; I had almost nothing to do with it, it is almost all the work of Ash Clark.)
The next Stylesheets meeting will take place on Tuesday June 22nd at 4 pm UTC, 9 am PDT, 12 pm EDT, and 6 pm CEST.