| Year | Event |
| 2018 |
| Canon source | Backstage source | Novel source | DITL speculation |
| # | Series | Season | Source | Comment |
| 1 | DS9 | 6 | You are Cordially Invited... | Sisko says that Dax is 356 years old. Presumes this refers to the birth of the symbiont |
| 2 | DS9 | 6 | You are Cordially Invited... | Sisko says that Dax is 356 years old |
| 3 | TOS | 1 | Space Seed | McGivers gives the date |
| Series : | DS9 Season 6 |
| Episode : | You are Cordially Invited... |
| Comment : | Sisko says that Dax is 356 years old. Presumes this refers to the birth of the symbiont |
| Series : | DS9 Season 6 |
| Episode : | You are Cordially Invited... |
| Comment : | Sisko says that Dax is 356 years old |
| Series : | TOS Season 1 |
| Episode : | Space Seed |
| Comment : | McGivers gives the date |
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