You don't understand the startdates?
Take, for example, 20260411.0329
Let me stick some spaces in some helpful places:
2026 04 11 . 03 29
That better?
20260411 means 11th April 2026, and 0329 is in 24-hour clock format, IE 3:29AM
Stardates in the Star Trek universe work in an entirely different way. Wikipedia has a good explanation on how Stardates work.