If there isn't a %X symbol for the abbreviation, you'll have to create it...
$string = strftime("%Z");
$part = explode(" ",$string);
for ($count=0;$count<count(part);$count++)
{
$abbr .= substr($part[$count],0,1);
}
echo $abbr;
The manual says %Z - time zone or name or abbreviation, though, so this is all dependant on how the user has their system set up. They might have "Central Standard Time" as default, or use "CST" already...you can't tell.
---John Holmes...