You don't understand the startdates?
Take, for example, 20251116.1938
Let me stick some spaces in some helpful places:
2025 11 16 . 19 38
That better?
20251116 means 16th November 2025, and 1938 is in 24-hour clock format, IE 7:38PM
Stardates in the Star Trek universe work in an entirely different way. Wikipedia has a good explanation on how Stardates work.