#include <ical.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>

int main(int argC, char* argV[])
{
    icaltimezone * myTZ = NULL;
    icalcomponent * vtimezone = NULL;

    if (argC <= 1)
        myTZ = icaltimezone_get_builtin_timezone("Europe/Zurich");
    else
        myTZ = icaltimezone_get_builtin_timezone(argV[1]);
    vtimezone = icaltimezone_get_component(myTZ);
    printf("%s", icalcomponent_as_ical_string(vtimezone));
    exit(0);
}