It's 12 hours of all pk. You can go 12 hours without digging. It's not too bad and I think it would be fun and encourage people to get out and pk more. Tink! did it a couple of times where the whole entire start area was a pk area. It was absolute chaos and I got a ton of kills.
Although we should get revive the whole entire time that it is going on. or else it would be awful and annoying.