The base system dating
Just as in an individual’s life, some birthdates may be so important that the whole culture chooses them as the reference point for its dating system. We are all quite familiar with the BC/AD dating system.
It uses Christ’s birth year as the zero point—all other years are based upon that one.
The number system used throughout the modern world is a fully place-valued decimal system.
The next question might be, what qualifies as a year significant enough to base an entire dating system upon it?
This dating system was devised in 525 by Dionysius Exiguus of Scythia Minor, but was not widely used until after 800.
The Gregorian calendar is the most widely used calendar in the world today.
Commanded by an unofficial triumvirate of General Armitage Hux, Kylo Ren and Captain Phasma, it was armed with a superweapon capable of destroying entire star systems halfway across the galaxy.
" Starkiller Base was a mobile ice planet located in the Unknown Regions that served as a stronghold of the First Order thirty years after the Battle of Endor.