#include <time.h>
#include <stdio.h>
#include <stdlib.h>
 
int main() {
  struct tm tm = {.tm_mday = 12, .tm_mon = 3, .tm_year = 2022 - 1900, .tm_zone = "America/Los_Angeles"};
  char str[100];
 
  setenv("TZ", "America/Los_Angeles", 1);
  tzset();
  
  size_t result = strftime(str, sizeof(str), "%z %Z", &tm);
  printf("%s\n", str);
  return 0;
}