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At a conference once I attended a talk by... I don't remember, but I think he was one of the main developers on #Perl's DateTime module.

metacpan.org/pod/DateTime

My take-away was pretty much: "Guys, this timekeeping stuff is so hard, you have no idea."

So what I learned, really, was never try to roll your own #time library. People who have worked on it for years say it's basically impossible. Use their code; at least it will be less wrong than whatever you would have come up with.

DateTime

A date and time object for Perl
metacpan.org
#perl #time
in reply to Triskaideka

Mark Gardner
mastodon - Link to source
Mark Gardner
• •

This section of a larger “falsehoods programmers believe in” page has almost two dozen links to articles explaining why dates, times, time zones, durations, and calendars are so hard: github.com/kdeldycke/awesome-f…

If I never debug date and time issues again it will be too soon, but I suspect the only solution is retirement.


awesome-falsehood/readme.md at main · kdeldycke/awesome-falsehood

😱 Falsehoods Programmers Believe in. Contribute to kdeldycke/awesome-falsehood development by creating an account on GitHub.
GitHub
in reply to Mark Gardner

Triskaideka
mastodon - Link to source
Triskaideka
• •
@mjgardner Fascinating reading, thanks for sharing! My "favorite" time irregularities are the missing days from the switch to the Gregorian calendar in 1582 (or 1752, or any of several other years depending on the country), and the fact that time passes at a different rate depending on your elevation.
@Mark Gardner
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