markdown/markup reference

The only thing I'm finding in terms of documentation for discord markup/down is the markdown 101. This is fine, but it would be useful to have more in depth thorough documentation for the supported markdown. I was specifically looking for more detail on the support for localized dates. I found that there is markdown for it, but I don't find any documentation for it from discord. That's kind of sad. If there is no documentation, can you point me to the code? I'll sort through that if I have to.

Thanks!