Difference between Date(dateString) and new Date(dateString)

Question

I have some code that tries to parse a date string.

When I do alert(Date("2010-08-17 12:09:36")); It properly parses the date and everything works fine but I can't call the methods associated with Date, like getMonth().

When I try:

var temp = new Date("2010-08-17 12:09:36"); alert(temp); 

I get an "invalid date" error.

Any ideas on how to parse "2010-08-17 12:09:36" with new Date()?

Answer 1

Date()

With this you call a function called Date(). It doesn't accept any arguments and returns a string representing the current date and time.

new Date()

With this you're creating a new instance of Date.

You can use only the following constructors:

new Date() // current date and time new Date(milliseconds) //milliseconds since 1970/01/01 new Date(dateString) new Date(year, month, day, hours, minutes, seconds, milliseconds) 

So, use 2010-08-17 12:09:36 as parameter to constructor is not allowed.

See w3schools.

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EDIT: new Date(dateString) uses one of these formats:

• "October 13, 1975 11:13:00"
• "October 13, 1975 11:13"
• "October 13, 1975"

Answer 2

The following format works in all browsers:

new Date("2010/08/17 12:09:36"); 

So, to make a yyyy-mm-dd hh:mm:ss formatted date string fully browser compatible you would have to replace dashes with slashes:

var dateString = "2010-08-17 12:09:36"; new Date(dateString.replace(/-/g, "/"));