You don't understand the startdates?
Take, for example, 20261029.1507
Let me stick some spaces in some helpful places:
2026 10 29 . 15 07
That better?
20261029 means 29th October 2026, and 1507 is in 24-hour clock format, IE 3:07PM
Stardates in the Star Trek universe work in an entirely different way. Wikipedia has a good explanation on how Stardates work.