Time zone discrepancy - America/New_York = CDT?

[Nathan Lebovic <nlebovic@xxxxxxxxx>]

I'm using PHP 5.2.6; I just updated timezones with PECL timezonedb to make
sure that wasn't the problem.

These are the results that I'm getting, which I cannot figure out:

date_default_timezone_set("America/New_York");
echo date("e"); //output "America/New_York"
echo date("T"); //output "CST"

date_default_timezone_set("EST");
echo date("e"); //output "EST"
echo date("T"); //output "CDT"

Any ideas?

Thanks,

- Nathan