The First Sparks
An attempt, made during the latter days of the old Republic to standardise calendars used across the Galaxy.
The date which the calendar was established is year 0, dates before that are indicated with BrS (Before resynchronisation), dates after have no letters following them.
Following is a short list of major events with their dates in this calendar system
Rusaan reformation: 965 BrS
Blockade of Naboo: 3
Start of the Clone Wars: 13
Jedi Purge: 16