You don't understand the startdates?
Take, for example, 20250424.1240
Let me stick some spaces in some helpful places:
2025 04 24 . 12 40
That better?
20250424 means 24th April 2025, and 1240 is in 24-hour clock format, IE 12:40PM
Stardates in the Star Trek universe work in an entirely different way. Wikipedia has a good explanation on how Stardates work.