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by kaoD 239 days ago
The only reason I can think of to 0-index months is so you can do monthName[date.getMonth()] instead of monthName[date.getMonth() - 1].

I don't think adding counterintuitive behavior to your data to save a "- 1" here and there is a good idea, but I guess this is just legacy from the ancient times.
2 comments
its_brass 239 days ago
A [StackOverflow thread](https://stackoverflow.com/a/41992352) about this interface says it was introduced by Java way back in 1995, and copied by the first JavaScript implementation.
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zahlman 239 days ago
(We don't have Markdown formatting here, BTW. But thanks for the heads up, and welcome to YC.)
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oblio 239 days ago
That would have a better solution in a date.getCurrentMonth(), in my opinion.
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kaoD 239 days ago
Temporal[0] is coming which solves many many many issues with JS Date, 1-based months[1] included!

Can't wait for it to be stable and widely available, it's just too good.

> month values start at 1, which is different from legacy Date where months are represented by zero-based indices (0 to 11)

[0] https://tc39.es/proposal-temporal/docs/

[1] https://tc39.es/proposal-temporal/docs/plaindate.html#month

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