Prime Timeline
   | Year | 
   Event | 
   | 4 billion bc | 
   
      
       
         ● [1]
         The Progenitor species scattered DNA codes on many worlds. The codes were designed to direct evolution on those planets to produce Humanoid intelligences. In addition, a goodwill message was included in the codes. [2]
      
 
      
         ● [3]
         Q begins a romantic involvement with a female Q. [4]
      
 
       | 
   
Colour key
● - Shows the canon status and reference of the year for this event
References
| # | 
Series | 
Season | 
Source | 
Comment | 
| 1 | 
TNG | 
6 | 
The Chase | 
The timeframe would need to be in this region to preceed the development of life on Earth | 
| 2 | 
TNG | 
6 | 
The Chase | 
The timeframe would need to be in this region to precede the development of life on Earth | 
| 3 | 
VOY | 
3 | 
The Q and the Grey | 
Q said they had been dating for 4 billion years. This date presumes that their relationship took place in a linear fashion, which is not necessarily the case. | 
| 4 | 
VOY | 
3 | 
The Q and the Grey | 
 |