Installing The Module
There are 3 ways to install the module:
Foundry has a built-in directory of modules that you can install. The easiest way is to use this feature and search for "Simple Calendar" and install!
Through the same built-in module installer in foundry, you can specify the link of the module to install instead of searching the directory. To install using the module json file, use this link https://github.com/vigoren/foundryvtt-simple-calendar/releases/latest/download/module.json
To install the most recent version of the module, view the releases section to the right of the main GitHub page. Selecting the latest release will bring you to a page where you can download the module.zip asset. This will contain everything you need to manually install the module.