After USA was moved earlier, Argentina being moved today means Valencia is also moved back yet another week, now to November 29th. The new schedule is on Wikipedia, for people who like a table format:
https://en.wikipedia.org/wiki/2020_MotoGP_season
About Jerez: World Superbikes has just announced their weekend there, which was supposed to be in a little over two weeks from now, has been rescheduled to October. The French round has been moved backward one week from late September to early October to avoid clashes with MotoGP and all that.
https://www.worldsbk.com/en/news/2020/Updated 2020 WorldSBK calendar for remaining rounds