You don't understand the startdates?
Take, for example, 20260408.0205
Let me stick some spaces in some helpful places:
2026 04 08 . 02 05
That better?
20260408 means 8th April 2026, and 0205 is in 24-hour clock format, IE 2:05AM
Stardates in the Star Trek universe work in an entirely different way. Wikipedia has a good explanation on how Stardates work.