Definitions of date arithmetic
D. J. Bernstein
djb at cr.yp.to
Fri Oct 9 23:17:26 UTC 1998
Ken Pizzini writes:
> This, to compute the date six months and three days before date X:
Could you explain exactly what you mean by that?
What is 1 month before 31 March? What is 1 month before 16 March? What
is 1 month before 1 March?
What is 1 month after 1 February? What is 1 month after 16 February?
What is 1 month after 28 February?
> Now the API itself needs a fair bit more thought than I've given it;
Semantics first, please.
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