Warning: The following paragraph(s) contain(s) information that ONLY appears in a Star Wars Tales #1–#20 story that has not been referenced elsewhere; therefore, its level of canonicity is ambiguous.
Warning: The following section is ambiguously canon. It contains information that originates in a source, possibly unlicensed, that has not been deemed definitively canon.
Warning: The following paragraph(s) contain(s) information that ONLY appears in a Star Wars Tales #1–#20 story that has not been referenced elsewhere; therefore, its level of canonicity is ambiguous.
↑The New Essential Chronology states that the Ruusan Reformation occurred in 1,000 BBY, which is the zero point of the calendar based on the Ruusan Reformation, so the difference between the calendar based on the Battle of Yavin and the Ruusan Reformation's year-notation system is 1,000 years. This date is derived using simple math based upon other confirmed dates.
↑The New Essential Chronology states that the Ruusan Reformation occurred in 1,000 BBY, which is the zero point of the calendar based on the Ruusan Reformation, so the difference between the calendar based on the Battle of Yavin and the Ruusan Reformation's year-notation system is 1,000 years. This date is derived using simple math based upon other confirmed dates.