Fixed an example to have the first day of the week to be Monday. Thanks FoamyGuy and mew-cx!
To use in CircuitPython, simply install the [Adafruit CircuitPython Bundle](https://circuitpython.org/libraries).
To use in CPython, `pip3 install adafruit-circuitpython-pcf8523`.
Read the [docs](http://circuitpython.readthedocs.io/projects/pcf8523/en/latest/) for info on how to use it.