Formatting a date in JavaScript

I noticed that JavaScript's new Date() function is very smart in accepting dates in several formats.

Get the Olson TZ name for the local timezone?

How do I get the Olson timezone name (such as Australia/Sydney ) corresponding to the value given by C's localtime call?

How to calculate the difference between two dates using PHP?

I have two dates of the form:

Start Date: 2007-03-24 

End Date: 2009-06-26

How do you get a timestamp in JavaScript?

How can I get a timestamp in JavaScript?

Something similar to Unix's timestamp, that is, a single number that represents the current time and date. Either as a number or a string.

How do I calculate someone"s age in C#?

Given a DateTime representing their birthday, how do I calculate someone's age?

datetime vs timestamp?

What would you recommend using between a datetime and a timestamp field, and why? (using mysql). I'm working with php on the server side.

Calculating relative time

Given a specific DateTime value, how do I display relative time, like

MySQL datetime fields and daylight savings time — how do I reference the "extra' hour?

I'm using the America/New York timezone. In the Fall we "fall back" an hour -- effectively "gaining" one hour at 2am. At the transition point the following happens:

How do I calculate someone"s age in C#?

Given a DateTime representing their birthday, how do I calculate someone's age?

How to check is timezone identifier valid from code?

I'll try to explain what's the problem here.

According to list of supported timezones from PHP manual, I can see all valid TZ identifiers in PHP.

Getting Current Time in string in Custom format in objective c

I want current time in following format in a string.

dd-mm-yyyy HH:MM

How do I determine if a string is date format?

I have some strings like this: 2012-02-05T07:42:47.000Z mixed with other strings. It is always in this format. (but the numbers are not the same, of course...the times are different) (not Sun, 05 Feb 2012 07:42:47 GMT )