You don't understand the startdates?
Take, for example, 20260918.1716
Let me stick some spaces in some helpful places:
2026 09 18 . 17 16
That better?
20260918 means 18th September 2026, and 1716 is in 24-hour clock format, IE 5:16PM
Stardates in the Star Trek universe work in an entirely different way. Wikipedia has a good explanation on how Stardates work.