void cal_load(year_t year, month_t month, day_t day, int days);
void cal_config(const char *group, const char *name, const char *key, const char *value);
+/* Merge functions */
+cal_t *merge_cals(cal_t *a, cal_t *b);
+event_t *merge_events(event_t *a, event_t *b);
+todo_t *merge_todos(todo_t *a, todo_t *b);
+
/* Event functions */
event_t *find_event(date_t *target);