You don't understand the startdates?
Take, for example, 20251009.1135
Let me stick some spaces in some helpful places:
2025 10 09 . 11 35
That better?
20251009 means 9th October 2025, and 1135 is in 24-hour clock format, IE 11:35AM
Stardates in the Star Trek universe work in an entirely different way. Wikipedia has a good explanation on how Stardates work.