Good day! I googled the whole stackechange, but was not able to find the answer. I'm quite new to Latex, so my approach is not proper. I try to define a macro, that should format greek letter as ...
I try to extract the year, month and day from a string and write different text depending on the given date. I thought I could use xstring and etoolbox, but I can'st get it to work. Here's the code ...