nowopen
nowopen is a simple program to display which places are currently open.

Installing
sudo make install to install, and sudo make uninstall to uninstall.
You should also create a file to store business hours in at either
~/.local/share/nowopen/businesshours (recommended) or ~/.businesshours.
An example businesshours file is provided, so you can get started by
running mkdir -p ~/.local/share/nowopen && cp example_businesshours ~/.local/share/nowopen/businesshours.
The businesshours format looks like:
1 Mario Bros Plumbing (plumbers):2 7am-6:30pm3 sun: closed