You don't understand the startdates?
Take, for example, 20261009.1155
Let me stick some spaces in some helpful places:
2026 10 09 . 11 55
That better?
20261009 means 9th October 2026, and 1155 is in 24-hour clock format, IE 11:55AM
Stardates in the Star Trek universe work in an entirely different way. Wikipedia has a good explanation on how Stardates work.