Gallifreyan Year 0

The Gallifreyan Year 0 was the year in the Rassilon Era in which Rassilon activated the Eye of Harmony. (COMIC: The Final Chapter)

Behind the scenes

 * The Gallifreyan Year Zero seems to be the Doctor Who universe's Time Lord equivalent to the real world Year Zero, non-existent in the Gregorian calendar, in which the human race began to count time in Earth's history.