Some time ago, I've written a simple tool to generate calendar image for a year. But the calendar in not usual format, but in hex format, i.e. with days, month and year in hexadecimal format.
Repository with sources in Python is available on github: https://github.com/delimitry/hex_calendar
Here is the result image of hex calendar for 2018 year (0x7e2 in hex) with SPbPython logo: