This is absolutely hilarious, and despite being long form, fits Twitter format very well, with each chunk funnier than the last :)
A few notes:
- Per my knowledge US is the only country which stubbornly (and illogically) considers Sunday to be the first day of the week;
- US (and maybe one or two English-speaking countries) are the only ones using 12h time, the rest of the world uses 24hrs, however 12h _sometimes_ is used conversationally;
- May be the author got tired (or whatever he took started to wear off) but I consider omitting the whole DST thing a major missed opportunity. :)
Also, for those interested, look up Swatch time invented in late 90s and touted as more logical replacement of the mess that we have. I believe they still maintain some Internet presence but mostly gave up on promoting it. Good luck breaking 1000+yo habits.