Activision and Treyarch have revealed the new content for the mid-season update in Call of Duty: Black Ops Cold War and Warzone presented, which will go live on September 09th.
The mid-season update introduces a variety of free content for multiplayer and Zombies, including... The Numbers Event New content is being delivered for both. From a reimagined Warzone Rumble, known as Clash, to a new functional melee weapon, the battle rages on bigger than ever in the 80s, while anticipation slowly builds for the upcoming Season 6 of Black ops cold war and Warzone prepared.
Regarding the upcoming Limited Time Event, it says:
"The Numbers Event is a limited-time reward stream for operators brave enough to investigate the trucks deployed by Perseus. This limited-time event begins on September 21 at 10:00 AM PT. Although operators have recently reported strange noises and events in their vicinity, there are two incentives for anyone willing to interact with these mobile transmission stations."
Among other things, you can look forward to an instant bonus of $2.000. The second incentive is directly linked to the limited-time Numbers event: For each unique Mobile Broadcast Station activated during the event, you'll receive an exclusive reward such as a sticker, a business card, or an amulet, in addition to some XP. You can also look forward to a new melee weapon: the Sai.

All further details about the Mid-Season Update can be found here. on the official website be found.