You don't understand the startdates?
Take, for example, 20250828.2206
Let me stick some spaces in some helpful places:
2025 08 28 . 22 06
That better?
20250828 means 28th August 2025, and 2206 is in 24-hour clock format, IE 10:06PM
Stardates in the Star Trek universe work in an entirely different way. Wikipedia has a good explanation on how Stardates work.