That's a very specific file name! looks like a compressed archive (using the 7-Zip format) likely containing data or logs from the second half ( H2 ) or December ( 12 ) of 2019 .
: A specific version of a project or dataset frozen at that time. 2019H12.7z
: Open-source data collections often use this naming convention (Year + Half + Month). That's a very specific file name
While I can certainly write a blog post for you, the content depends entirely on what is inside that file. This filename is commonly seen in: 2019H12.7z