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this post was submitted on 06 Nov 2023
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So, the flip side to that is that sometimes you need to add one month to a date, because that sometimes how human systems are written.
By not providing a function that does that, you're just pushing the confusion down to the developer, who is more likely to make terrible errors in the process, get frustrated, or use one of N different competing libraries, each of which chose a different answer.
Omitting functionality that can behave unintuitively in certain circumstances means leaving out a lot of functionality that people need.
Like, "decimal numbers" go pathological in certain cases. So do Unicode characters. Don't even bother thinking about connecting to the network.
Why wouldn't you just use the ruby functions for adding a month to a date?
https://ruby-doc.org/stdlib-2.5.1/libdoc/date/rdoc/Date.html#method-i-3C-3C
It seems really weird that there's so much pushback against "date time math is tricky, read the manual to find out exactly which compromise your library chose".