Regarding JavaScript new Date() and Date.parse()

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The string in your example is not in any of the standard formats recognized by browsers. The ECMAScript specification requires browsers to be able to parse only one standard format:

The format is as follows: YYYY-MM-DDTHH:mm:ss.sssZ

This format includes date-only forms:

YYYY

YYYY-MM

YYYY-MM-DD

It also includes time-only forms with an optional time zone offset appended:

THH:mm

THH:mm:ss

THH:mm:ss.sss

Also included are “date-times” which may be any combination of the above.

If the String does not conform to that format the function may fall back to any
implementation-specific heuristics or implementation-specific date formats. Unrecognizable Strings or dates
containing illegal element values in the format String shall cause Date.parse to return NaN.

So in your example, using 2010-12-23T23:12:00 is the only string guaranteed to work. In practice, most browsers also allow dates of the format DD Month YYYY or Month DD, YYYY, so strings like 23 Dec 2010 and Dec 23, 2010 could also work.

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