Let me stick some spaces in some helpful places:
2015 01 20 . 23 00
That better?
20150120 means 20th January 2015, and 2300 is in 24-hour clock format, IE 11:00PM
Stardates in the Star Trek universe work in an entirely different way. Wikipedia has a good explanation on how Stardates work.
Events on this stardate
This film probably needs no introductions as it's one of the most recent movies in the second phase of Marvel's cinematic Universe, but just in case you're not aware, it is about a ragtag group of criminals are forced to work together and put aside their differences in a bid to save the Universe.
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