You don't understand the startdates?
Take, for example, 20251207.0359
Let me stick some spaces in some helpful places:
2025 12 07 . 03 59
That better?
20251207 means 7th December 2025, and 0359 is in 24-hour clock format, IE 3:59AM
Stardates in the Star Trek universe work in an entirely different way. Wikipedia has a good explanation on how Stardates work.