Star Wars: Dawn of the Jedi Book Two—Prisoner of Bogan establishes the year 36,453 BBY as the date of the Tho Yor Arrival, which is the zero point of the Tho Yor Arrival dating system, meaning the difference between the calendar based on the Battle of Yavin and the TYA year-notation system is 36,453 years. This date is derived from simple math based upon other confirmed dates.

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