Answer Posted / vijaya

By using date_default_timezone_get and
date_default_timezone_set function on PHP 5.1.0
// Discover what 8am in Tokyo relates to on the East Coast
of the US

// Set the default timezone to Tokyo time:
date_default_timezone_set('Asia/Tokyo');

// Now generate the timestamp for that particular timezone,
on Jan 1st, 2000
$stamp = mktime(8, 0, 0, 1, 1, 2000);

// Now set the timezone back to US/Eastern
date_default_timezone_set('US/Eastern');

// Output the date in a standard format (RFC1123), this will
print:
// Fri, 31 Dec 1999 18:00:00 EST
echo '

', date(DATE_RFC1123, $stamp) ,'
';?>

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