text: #ifndef TIME_H_INCLUDED
  #define TIME_H_INCLUDED
  
  struct date
  {
      int day;
      int month;
      int year;
  };
  
  
  int is_leapyear(int year);
  int get_days_for_month(int month, int year);
  int exists_date(struct date target_date);
  int day_of_the_year(struct date target_date);
  int get_week_day_in_int(struct date target_date);
  char *get_week_day(struct date target_date);
  struct date input_date();
  
  #endif // TIME_H_INCLUDED
  