Slayterday
From ThresholdRPG Wiki
Slayterday is a once-a-week event that runs every Saturday from 7AM until 2AM the following Sunday. During Slayterday, you will receive double experience points for every creature slain and every thing crafted!
In addition, Bonus World Drop is enabled, granting random chances to get free loot when you slay monsters!
See: MNF