8:46 now released. No, that is not exactly a clock in the Titlebar.
Contained within /usr/share/themes/846/ is a file "In Memory" that explains the background and purpose of this theme.
To Install on Cinnamon, XFCE or Mate:
Focal and Bionic Repository:
sudo add-apt-repository ppa:aravisian/gtk-theming
sudo apt-get update && sudo apt install 846