Why does this date turn into a day earlier when the new date () is used?

Question

Given date 2016-02-04. Suppose it will be February 4th, 2016. But when I use it new Date(), it returns as Wed Feb 03 2016 16:00:00 GMT-0800 (PST), rather than Thu Feb 04....

Below I literally do everything:

var _entryDate = new Date("2016-02-04");
console.log(_entryDate); // Wed Feb 03 2016 16:00:00 GMT-0800 (PST)

Why is this happening and how do I get the desired result, which is February 4, and not the day before?

Answer 1

var dateArray = "2016-02-04".split("-");
var year = dateArray[0];
var month = parseInt(dateArray[1], 10) - 1;
var date = dateArray[2];
var _entryDate = new Date(year, month, date);
alert(_entryDate);

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Removed unnecessary parseIntfor monthand yearas suggested by @RobG

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Answer 2

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Answer 3

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new Date('2016-02-04')
//=> Wed Feb 03 2016 19:00:00 GMT-0500 (EST)  - midnight UTC
new Date(2016,2,4)
//=> Fri Mar 04 2016 00:00:00 GMT-0500 (EST)  - midnight EST

:

new Date('2016-02-04T00:00:00-05:00')

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Answer 4

This is because the date is stored (and parsed) in UTC, but displayed in your local time zone. To display the correct date, you can use

new Date("2016-02-04").toISOString()