Observed on the 22nd of December each Year.
On December 22nd, 3098 Shiss forces bombard the 33rd Colony and destroyed all life on the Planet.
The day is observed by all Union member Shiss and if possible they travel to that colony for the solemn activities.
A Shiss does not eat during that day. They often place ashes on their heads or carry a small sack with Soil from the 33rd Colony on a string around their necks.
One hundred randomly chosen names of the victims are transmitted to every Union Shiss and are chanted at the same hour, regardless where this Shiss might be at that time.