Turning PST / PDT unixtime stamps into UTC date objects

gistfile1.js

// unixtime stamps from server are PT, need to make them UTC
var getAdjustedDate = function ( unixtime ) {
	if ( !unixtime ) { return new Date(); }
	var date, dst, offset;
	// create date object
	if ( typeof unixtime === 'number' ) {
		date = new Date( unixtime * 1000 );
	} else if ( typeof unixtime === 'string' ) {
		unixtime = parseInt( unixtime, 10 );
		date = new Date( unixtime * 1000 );
	} else {
		return new Date();
	}
	// try to figure out if client is in daylight savings time
	date = date.toString();
	dst = date.match( /\((.*)\)/ );
	dst = dst && dst.length ? dst[ 1 ][ 1 ] : null;
	// assume that if they are, pacific zone will be as well
	offset = dst === 'D' ? 7 * 60 * 60 : 8 * 60 * 60;
	// subtract pacific offset to make unixtime match UTC
	unixtime = unixtime - offset;
	// return the adjusted date
	return new Date( unixtime * 1000 );
};