how get month from a string in javascript

Question

i have a date in string like this: var myDateStr='1431451872338.00';

i want, getMonth() from this format date, i do:var date = new Date(myDateStr); but always return invalid date.

and the method getMont() always return NaN, if I put this: var date = new Date(1431451872338.00); this return the date correct but with my string not

my var myDateStr get the value from json and is variable, if someone can help me thank you very much in advance, i hope do understand

Answer 1

This works fine for me. You just need to be sure you're inputing a number, not a string.

var number = parseInt("1431451872338.00");
var date = new Date(number); //Tue May 12 2015 12:31:12 GMT-0500 (CDT)
var month = date.getMonth(); // 4

Answer 2

A Date object cannot be instantiated with a string. You better 1st transform your string into an Int and then ask for month:

var myDateStr='1431451872338.00';
var date = new Date(parseInt(myDateStr, 10));
alert(date.getMonth());