Warhammer 40,000

>Jesus Christ?
What you on about?
They count from the start of the Common Era.

Because Jesus is Lord and everyone should follow his teachings lest they spend an eternity suffering in damnation

The Emperor is just a futuristic envisionment of Christ. The Imperium is Christendom. Many Space Marine chapters represent major Christian kingdoms of the Middle Ages.

>Common Era
Ah the system that just magically aligns with the time frame of Christ's birth.

"Common Era" is such a hilarious failure by atheists.

When the Emperor formed the Imperium he revived the Gregorian calendar and used it as the unified chronology of all worlds. That's the actual plot-reason.

Because he liked the Gregorian calendar and the most common interpretation of that begins at Christs birth

What starting point do you think he should use instead ?

Unification of Terra would make sense.

Then It would be Warhammer 10000 and it would need more explanations