Prime Timeline
   | Year | Event | 
   | 2169 | 
         ● [1]
         A new type of impulse engine is adopted. The basic design of impulse drive remains unchanged for at least two centuries. [1]
 | 
   | 2222 | 
         ● [2]
         Montgomery Scott is born. [2]
      
 | 
   | 2243 | 
         ● [3]
         Scotty becomes a Starfleet engineer. [3]
      
 | 
   | 2294 | 
         ● [1]
         Scotty retires from Starfleet relocates to the Norpin V colony. His ship crashes on a Dyson Sphere while on route to Norpin and Scotty places himself into suspended animation to await rescue. [1]
      
 | 
   | 2369 | 
       ● [1]
         The Enterprise-D discovers the transport ship Jenolan crashlanded on a Dyson Sphere. Captain Scott is recovered from the ship, having been in stasis since 2294. Captain Scott subsequently sets off in a shuttlecraft for parts unknown. [1] | 
   
Colour key
● - Shows the canon status and reference of the year for this event
References
| # | Series | Season | Source | Comment | 
| 1 | TNG | 6 | Relics |  | 
| 2 | TNG | 6 | Relics | Scotty was 147 years old in 2369 | 
| 3 | TNG | 6 | Relics | Scotty said he had been an engineer for 52 years before retiring |