How to set IANA database path at runtime

[xsgao-github]

I tried the same lib in C++ 20, but there seems to be a bug that date::current_zone() does not work on Windows 2016/2019. So I have to downgrade my project's C++ language std to 17.

I want to ship the IANA database with my application, but the installation directory is only defined when my users install my app. So setting -DINSTALL=... may not work. Is there way to set the IANA database directory at runtime?

I changed get_download_folder(), but it's not invoked at all.