Call Of Duty Black Ops 4 Beta: Start Time, Platforms, Maps, Modes
https://www.gamespot.com/articles/call-of-duty-black-ops-4-beta-start-time-platforms/1100-6461072/
The next Call of Duty: Black Ops 4 beta is coming up soon--and it'll be available on more platforms than the first one. The Weekend 2 event kicks off on August 10 at 10 AM PT for PlayStation 4 and Xbox One, as well as PC. To get in, you need a code that you can obtain by pre-ordering or other means. GameSpot is giving away codes--here's how to enter.
If you're playing on PC and willing to wait an extra day, there will be an open beta on PC starting on August 11. In all cases, the beta ends on August 13 at 10 AM PT. You can see the schedule below, as posted on the Call of Duty website.