Tizen Native API  6.5
calendar_example_01.c
#include <Elementary.h>

EAPI_MAIN int
elm_main(int argc EINA_UNUSED, char **argv EINA_UNUSED)
{
   Evas_Object *win, *cal;

   win = elm_win_util_standard_add("calendar", "Calendar Creation Example");
   elm_win_autodel_set(win, EINA_TRUE);
   elm_policy_set(ELM_POLICY_QUIT, ELM_POLICY_QUIT_LAST_WINDOW_CLOSED);

   cal = elm_calendar_add(win);
   evas_object_size_hint_weight_set(cal, EVAS_HINT_EXPAND, EVAS_HINT_EXPAND);
   elm_win_resize_object_add(win, cal);
   evas_object_show(cal);

   evas_object_show(win);

   elm_run();

   return 0;
}
ELM_MAIN()