Is there a jQuery function for converting time zones?

Is there a jQuery function for converting time zones?

For my needs, I care mainly about the continental U.S. (Pacific, Mountain,
Central, and Eastern time zones), but a bonus would include the others,
too.
What I wonder is if there is a known jQuery function that will return
values that take into consideration daylight saving time when converting
from one hour to anothertaking daylight saving time rules into account.
I reckon would be called something like this:
var pertinentDatetime = getDateTimeFor(thisDateTime, thisTimeZone,
desiredTimeZone);
Does anybody have or know of such a function?