Prime Timeline
   | Year | Event | 
   | 2141 | 
       ● [1]
         The Vulcan Kov has a falling out with his father. The rift will last for at least the next ten years, at which time Kov's father is a minister at the Vulcan High Command. Kov will refuse several offers of reconciliation from his father during that time. [2] | 
   | 2144 | 
         ● [3]
         The Vulcan ship Vahklas leaves the planet with a group of V'tosh ka'tur - 'Vulcans without logic' - who are experimenting with creating a new lifestyle for themselves. [3]
      
 | 
   | 2151 | 
         ● [2]
         The NX-01 encounters a group of Vulcans who believe in experiencing emotions. T'Pol is forced to undergo a mind meld by one of the group, contracting Pa'nar Syndrome in the process. [2]
      
 | 
   
Colour key
● - Shows the canon status and reference of the year for this event
References
| # | Series | Season | Source | Comment | 
| 1 | ENT | 1 | Fusion | Admiral Forrest said this had happened 'about ten years ago'. | 
| 2 | ENT | 1 | Fusion |  | 
| 3 | ENT | 1 | Fusion | Eight years before the episode |