You don't understand the startdates?
Take, for example, 20250430.0310
Let me stick some spaces in some helpful places:
2025 04 30 . 03 10
That better?
20250430 means 30th April 2025, and 0310 is in 24-hour clock format, IE 3:10AM
Stardates in the Star Trek universe work in an entirely different way. Wikipedia has a good explanation on how Stardates work.