Day 12, 12:00, for 8 hours: 22 zombies at ×3 health and ×3 attack.
Part of Endless tier 3, day 2 of 5.
When it ends: 
Scrap Paper
Scrap Metal
Five-Spice Beef Jerky (Endless rewards, tiers 1-4)
Day 12, 12:00, for 8 hours: 22 zombies at ×3 health and ×3 attack.
Part of Endless tier 3, day 2 of 5.
When it ends: Scrap PaperScrap MetalFive-Spice Beef Jerky (Endless rewards, tiers 1-4)