You don't understand the startdates?
Take, for example, 20260829.1107
Let me stick some spaces in some helpful places:
2026 08 29 . 11 07
That better?
20260829 means 29th August 2026, and 1107 is in 24-hour clock format, IE 11:07AM
Stardates in the Star Trek universe work in an entirely different way. Wikipedia has a good explanation on how Stardates work.