I am trying to build a huge latex project on my system – I downloaded everything, and did not touch anything. XeLaTeX tells me that datetime2.sty is missing, and I guess I just have to download it, and put it in the project folder?
But I can not find it online: Either I end up with pdf files that tell me something about other languages, or I get the link to CTAN, and it has only files with other endings, so I don't really understand why I get linked there?
(This happens quite often and this CTAN thing NEVER had a useful file for me, so I figure I just don't know how to use it, and it certainly doesn't seem intuitive.)
Best Answer
Ok, in case another dummy like me has the same problem, here are some most important comments that helped me:
"The package is actually embedded in the documentation. The 'ins' file is an 'install' file; running latex on it will extract the necessary files from the dtx (Documented (La)TeX). But again, I would use your package manager; there are GUI managers in both TeXLive and MiKTeX. It would help greatly if you let us know which distribution you have :)" by Sean Alfred
"OK, what does pdftex --version at the command line/terminal print?" by Joseph Wright
What did I do, step by step: Press windows key, and press the arrow down - this is apparently where all the programs are hidden now, I had no idea. There I found the MikTex Package manager, named only "Package Manager", so it was not findable through search previously. Synchronize database, then find datetime2 and install it.