Reckoning of the Sages of Minorad

From MTG Salvation Wiki

The Reckoning of the Sages of Minorad is a calendar primarily used in Corondor. Year 1 in this reckoning begins on the anniversary of the gathering of the Sages of Minorad. It corresponds with the year 3000 of the Argivian Reckoning.

Note though that many dates in the comics have become obsolete after the revision of the storyline. It is also speculated that this reckoning (used by planeswalkers) could be an interplanar calendar, and that's why it doesn't correspond to other Dominarian calendars.