Stardates Explained - 20180822.0847

You don't understand the startdates?

Take, for example, 20180822.0847

Let me stick some spaces in some helpful places:

2018 08 22 . 08 47

That better?

20180822 means 22nd August 2018, and 0847 is in 24-hour clock format, IE 8:47AM

Stardates in the Star Trek universe work in an entirely different way. Wikipedia has a good explanation on how they work.

Events on this stardate