Date.UTC() inconsistent parameters?

Question

Why does the month parameter range from 0-11 yet the day parameter ranges from 1-31? It seems inconsistent, what is the reason?

Parameters

year: A year after 1900.
month: An integer between 0 and 11 representing the month.
date: An integer between 1 and 31 representing the day of the month.

there is no good reason, it's just the way god (brendan) made it. — dandavis, Aug 25 '14 at 01:18
day: An integer between 0 and 6 representing the day of the week. — kennebec, Aug 25 '14 at 02:36

score 0 · Accepted Answer · answered Aug 25 '14 at 01:26

Just like the duplicate thread that was called out in the comments, I don't think there is any true reason why. The most logical reason sounds like users would end up creating an Array that has all the Months. For example, var months = ["Jan", "Feb", "Mar", "Apr", ...];

This array would be easy to return the correct month if used properly since the Month range is 0 - 11. return months[date.getMonth()];

Whereas there are other methods to handle what day it is (Monday, Tuesday, Wednesday, ...) using the date.getDay() (which returns 0 - 6).

Date.UTC() inconsistent parameters?

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