You don't understand the startdates?
Take, for example, 20170130.2227
Let me stick some spaces in some helpful places:
2017 01 30 . 22 27
That better?
20170130 means 30th January 2017, and 2227 is in 24-hour clock format, IE 10:27PM
Stardates in the Star Trek universe work in an entirely different way. Wikipedia has a good explanation on how Stardates work.