You don't understand the startdates?
Take, for example, 20001219.1333
Let me stick some spaces in some helpful places:
2000 12 19 . 13 33
That better?
20001219 means 19th December 2000, and 1333 is in 24-hour clock format, IE 1:33PM
Stardates in the Star Trek universe work in an entirely different way. Wikipedia has a good explanation on how Stardates work.