'The structure with the schedule of school classes is given. How to finish the program to find out if there are classes on Saturday

#include <iostream>
#include<Windows.h>
#include<string>
using namespace std;
using LINE = char[20];
enum DAY_OF_WEEK { mon, tue, wed, thu, fri, sat, sun };
struct TIME
{
    int hours[23], minutes[59];
};
struct SEMINAR
{
    LINE subj, prepod;
    DAY_OF_WEEK day;
    struct clock
    {
        TIME begin, fin;
    };
    using GROUP_NUMBER = int[300];
};
int auditorium;

what should I add? I don't really understand how I should check that there should be classes on Saturday



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