Let me stick some spaces in some helpful places:
2018 05 24 . 23 00
20180524 means 24th May 2018, 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 they work.
Events on this stardate
Don't Panic! We're celebrating Towel Day (a day earlier but...yeah), inspired by the reference in his most popular work: The Hitchhiker's Guide to the Galaxy. We're planning to honour Douglas Adams' fantastic novel by watching an adaption (in some shape or form, TBC), but the important thing is to bring a towel! Whoever brings a towel gets a little reward for their effort!
This happens every year on the 25th of May as a tribute to the late Douglas Adams. As a reference to the awesome Hitchhikers Guide to the Galaxy, fans carry with them a towel in his honour. Do you know where your towel is?