Thanks to LoadRunner:
This is a 4 day event.

1. Punctuality (Days Login)
1-2-3-4

2. Expeditions (Expeditions)
1-3-5-7-10-13-16-20

3. Value Exchange (Spending Emeralds)
100-250-450-700-1000-1500-2500-4000-7000-10000-15000-20000-25000-40000-55000-80000

4. Fusion of Souls (Hero soul stones, Repeatable)
30-50-100-150-250

5. Secrets of Outland (Outland chests, Repeatable)
1-3-5-10-15-20-25

6. Spending Energy (Spending Energy, Repeatable)
100-200-300-400-700-1000-1300-1600-2200-2800-3400-4000

Rewards:
Emeralds
Artifact Coins
Chaos Cores
Artifact Essence Chest
Artifact Scrolls Chest
Artifact Metals Chest