Plurrrr

If you are the kind of developer who prefers to work in UTC, you may have seen Python's datetime.utcnow() and datetime.utcfromtimestamp() methods and thought, "Ah, yes, this is what I should do to work in UTC!" But alas, this is not the best way to work with UTC datetimes. In fact I would say that it is extremely rare that you would want to use either of these functions.

This is my own collection of hard-earned knowledge about how integers work in C/C++, and how to use them carefully and correctly. In this article, I try to strike a balance between brevity (easing the reader) and completeness (providing absolute correctness and extensive detail)