#include <time.h> 
#include <stdlib.h> 
#include <stdio.h> 

int main(void) 
{ 
   time_t td; 

   putenv("TZ=PST8PDT"); 
   tzset(); 
   time(&td); 
   printf("Current time = %s\n", asctime(localtime(&td))); 
   return 0; 
}