parseISO behaves different when time is provided and not provided in input string

[lokeshpathrabe]

When date string has no time in it. The time component is adjusted for local TZ and the date gets changed

console.log(parseISO('2012-12-12')) // prints 2012-12-11T18:30:00.000Z

When date string with time is given no TZ adjustment happens and date is printed as it was given.

console.log(parseISO('2021-02-10T08:25:00Z')) // prints 2021-02-10T08:25:00.000Z
console.log(parseISO('2021-02-10T00:00:00Z')) // prints 2021-02-10T00:00:00.000Z

Why is the TZ conversion behaviour different in these 2 cases. It should either adjust time or not. Am I missing something here or is this a bug?

[lokeshpathrabe]

Never mind. I missed the 'Z' part in the date string. If dateString without 'Z' is given the function will always adjust for TZ