Gray world.

April 19, 2038 (Earth calendar) (Planet of the minor sage N°2).

It was a horrible day for the human army here. The day of the blood moon came to this planet. The nearby planets also had the blood moon and it was really powerful.

The effect was not only on planets with a "moon", as rare as it may seem, it was on many planets. A "moon" would appear temporarily if there wasn't one. A temporary one appeared, made of blood and mana.

Today was the lunar day of the death cycle, of the hero's year. It was the 100th year of the hero. 

This calendar was confusing to Viktor, but now he could understand it quite...decently. The days were 15 per cycle, with 30 cycles per year. The years were 200, which repeated constantly. 

Even the natives didn't know about the date here, it really was a strange calendar, but many said it had a special meaning.