#include<iostream>
#include<iomanip>
using namespace std;

class date
{
	int dd;
	int mm;
	int yy;
	int day;
	
	friend istream& operator>>(istream&, date&);
	friend ostream& operator<<(ostream&, date&);
	
	void setday();   
	
	public:
	int getdate(){ return dd;}
	int getmon(){ return mm;}
	int getyear(){ return yy;}
	int getday(){ return day;}
};

void date::setday()
{
	int q=dd,m,y=yy;
	if(mm==1||mm==2)
	{
		m=mm+12;
		y--;
	}
	else            m=mm;
	
	int K=y%100, J=y/100;
	
	day=(q+((m+1)*26)/10+K+K/4+J/4+5*J)%7;
	//Zeller's Congruence
}

istream& operator>>(istream &is, date &a)
{
	char ch;
	is>>ch;
	is.putback(ch);
	is>>a.dd;
	is.get();
	is>>a.mm;
	is.get();
	is>>a.yy;
	
	a.setday();
	return is;
}

ostream& operator<<(ostream &os, date &a)
{
	switch(a.day)
	{
		case 0 : os<<"Saturday, "; break;
		case 1 : os<<"Sunday, "; break;
		case 2 : os<<"Monday, "; break;
		case 3 : os<<"Tuesday, "; break;
		case 4 : os<<"Wednesday, "; break;
		case 5 : os<<"Thursday, "; break;
		case 6 : os<<"Friday, "; break;
	}
	
	os<<setfill('0')<<setw(2)<<a.dd;
	
	switch(a.mm)
	{
		case 1 : os<<" January "; break;
		case 2 : os<<" February "; break;
		case 3 : os<<" March "; break;
		case 4 : os<<" April "; break;
		case 5 : os<<" May "; break;
		case 6 : os<<" June "; break;
		case 7 : os<<" July "; break;
		case 8 : os<<" August "; break;
		case 9 : os<<" September "; break;
		case 10 : os<<" October "; break;
		case 11 : os<<" November "; break;
		case 12 : os<<" December "; break;
	}
	
	os<<setw(4)<<a.yy<<setfill(' ');
	return os;
}


int main()
{
	date d;
	cout<<"Enter a date (dd/mm/yy) : ";
	cin>>d;
	cout<<"\n\nEntered date :\n\n"<<d<<"\n\n";
	system("pause");
}