Prime Timeline
   | Year | 
   Event | 
   | 37,600 bc | 
   
      
       
         ● [1]
         A group of aliens from the Delta Quadrant visit Earth and are greatly impressed by the spirituality of those Humans living on the Siberian Peninsula. [1]
      
 
 | 
   | 2053 | 
   
      
       
         ● [2]
         The Vulcans make first contact with the Arkonians. The initial contact goes well but the Arkonians prove hostile and difficult to deal with, and eventually contact is broken off. [2]
      
 
       | 
   
Colour key
● - Shows the canon status and reference of the year for this event
References
| # | 
Series | 
Season | 
Source | 
Comment | 
| 1 | 
ENT | 
2 | 
Dawn | 
The alien said this happened 40,000 years ago. This is a rounded date | 
| 2 | 
ENT | 
2 | 
Dawn | 
T'Pol said that this happened almost a hundred years ago; this is 99 years before the episode |