You don't understand the startdates?
Take, for example, 20110221.2351
Let me stick some spaces in some helpful places:
2011 02 21 . 23 51
That better?
20110221 means 21st February 2011, and 2351 is in 24-hour clock format, IE 11:51PM
Stardates in the Star Trek universe work in an entirely different way. Wikipedia has a good explanation on how Stardates work.