Why is month value a 0 based array?

[Shakebag]

What is the point of having a 0 based index for the month field? Shouldn't it be the month number that it corresponds with?

<MonthPicker classes={'datePicker'} {...rest} defaultValue={'Month'} // default is 1900 start={1} // default is ASCENDING reverse // default is false value={value} // mandatory onChange={month => onChange(month)} required={true} />

For some reason in the react developer tools I see:
<option key='0' value{0} className={null}>1</option>
Then rendered in html :
<option value="0">1</option>

[ssxv]

Sure it could have been 1-12..
But I kept it 0-11 to keep in line with JavaScript's months which are 0-11.

[Shakebag]

That's a valid reason. I poked around online and found some interesting comments about it likely coming from C function implementation(Link to stack overflow discussion). That's why I was confused. Traditionally I've posted to my server side complete dates, but for some reason another developer used your library and posted the values from the components individually throwing everything a month back, but the days were correct. Thanks for getting back to me. I'll handle it in the javascript Date implementation.