gmt_to_local()

gmt_to_local([$time = ''[, $timezone = 'UTC'[, $dst = FALSE]]])

Takes a UNIX timestamp (referenced to GMT) as input, and converts it to a localized timestamp based on the timezone and Daylight Saving Time submitted.

Example:

$timestamp = 1140153693;
$timezone  = 'UM8';
$daylight_saving = TRUE;
echo gmt_to_local($timestamp, $timezone, $daylight_saving);