Enact a new Rule, “The Timeline”:-

Scattered throughout time are a number of significant Node Events, each with a unique game date and description. These are recorded in the Timeline page of the wiki.

Any Traveller may create or redescribe a Node Event at their current Temporal Location (and optionally create or redescribe a single Node Event with a later game date, where the two Events can be argued to be connected), by editing the wiki page appropriately, and then posting an entry to the weblog that describes their manipulation of the Timeline.

The Arbiter may redescribe or delete Node Events anywhere on the Timeline, if he feels their causality to be discordant.

Create the Timeline and add “1419/11/26 - Death of the Abbot of the Badia a Passignano” to it.