What you are doing is inspiring, I'm currently a student with not so much money but doing somthing like this is definitely on my list when I can afford it. Thanks for doing it and also the Idea. I'm sure, as you know, that there are many who are grateful.
I get that it's about being funny, but the roman calender is not completely universal either, there is at least Iran, my home country and afghanestan which has the solar hijri calender as it's first official calender which is very much logical and accurate. You can visit
https://en.m.wikipedia.org/wiki/Solar_Hijri_calendar
For more info
Also in Iran the week starts with saturday.
If you look from an american or a british person these are all valid points and I got the fun and laughed but couldn't help my self not saying all these
And I'm sure Iran is just an instance