[2020] Is tomorrow included or excluded from the anniversary event?

It's fair to think that, and usually (but not this time as it goes) there is a contingency plan. For Vermintide 1, we did a similar event using different telemetry. It was extrapolated from a sample of end of game reports. By all accounts pretty accurate, but not to the dime. We just multiplied the telemetry by 10, since we only captured 1 in 10 games. The same telemetry was used to guestimate what players would finish within the allotted time frame, rounded up usually. I updated that counter manually every few hours. It was exhausting. But the data was legit. We had the option to adjust the multiplier but it wasn't needed and actually came down to the wire, I think the challenge was finished in the final hour. (it was a 4 day event if memory serves)

For V2 though all clients report back their kills to the counter on round end. There's some protections and blacklists that work against people trying to report false data. But the data is 100% from game clients finishing maps. For the two we've run in V2, that data has been automatically placed in to the web counter and in-game 'news ticker' counter, a live feed essentially. We're totally hands off, I promise :)

There's probably a way, but getting the implementation time might be tricky! The count goes through the same backend service where progression is stored, so we'd just need to increment a figure there and have the game display it in some fashion. I'll dig.

For Darktide we have already discussed this, we're afforded the luxury of screens in-game with that IP, so stuff like this becomes all the more immersive.