Go: package main

import "fmt"

func main() {
	days := [12]int{31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}
	weekday := [7]string{"Wednesday", "Thursday", "Friday", "Saturday", "Sunday", "Monday", "Tuesday"}

	for {
		var m, d int
		fmt.Scan(&m, &d)
		if m == 0 {
			break
		}

		for i := 0; i < m-1; i++ {
			d += days[i]
		}

		fmt.Println(weekday[d%7])
	}
}

C++: #include <iostream>

using namespace std;


int main()
{
    int m[50],d[50];
    int x = 0;
    string Day[7] = {"Thursday", "Friday","Saturday","Sunday","Monday", "Tuesday", "Wednesday"};
    int BanyakHari[12] = {31,29,31,30,31,30,31,31,30,31,30,31};
    string ThatDayIs[50];

    do
    {
        int DayinBetween = 0;
        cin >> m[x] >> d[x];
        if((m[x] == 0) && (d[x] == 0))
        {
            break;
        }
        //Check banyak hari antara 1 Januari - Input
        for(int y = 0; y < m[x]-1; y++)
        {
            DayinBetween = DayinBetween + BanyakHari[y];
        }
        DayinBetween = DayinBetween + d[x] - 1;

        //Kurangi sampai < 7
        while(true)
        {
            if(DayinBetween >= 7)
            {
                DayinBetween = DayinBetween - 7;
            }
            else
            {
                break;
            }
        }

        ThatDayIs[x] = Day[DayinBetween];

        x++;
    }
    while(x < 50);

    for(int z = 0; z < x; z++)
    {
        cout << ThatDayIs[z] << endl;
    }


}

C++: #include<iostream>
using namespace std;
int main(){
	int m,d,n=0,date[50]={0},i=0;
	while(cin>>m&&m!=0){
		cin>>d;
		switch(m){
			case 1:
				break;
			case 2:
				d=d+3;
				break;
			case 3:
				d=d+4;
				break;
			case 4:
				break;
			case 5:
				d=d+3;
				break;
			case 6:
				d=d+5;
				break;
			case 7:
				d=d+1;
				break;
			case 8:
				d=d+4;
				break;
			case 9:
				d=d+6;
				break;
			case 10:
				d=d+2;
				break;
			case 11:
				d=d+4;
				break;
			case 12:
				d=d+6;
				break;
		}
		date[i]=d%7;
		i++;
		n++;
	}
	for(int i=0;i<n;i++){
		switch(date[i]){
			case 0:
				cout<<"Wednesday"<<endl;
				break;
			case 1:
				cout<<"Thursday"<<endl;
				break;
			case 2:
				cout<<"Friday"<<endl;
				break;
			case 3:
				cout<<"Saturday"<<endl;
				break;
			case 4:
				cout<<"Sunday"<<endl;
				break;
			case 5:
				cout<<"Monday"<<endl;
				break;
			case 6:
				cout<<"Tuesday"<<endl;
				break;
		}
	}
}

C++: #include<bits/stdc++.h>
using namespace std;

int main(void){
	while(1){
		int month, day;
		int days_from_new_year = 0;
		cin >> month >> day;
		if(month == 0 && day == 0) break;
		for(int i = 1; i < month; i++){
			if(i == 1 || i == 3 || i == 5 || i == 7 || i == 8 || i == 10 || i == 12) days_from_new_year += 31;
			else if(i == 4 || i == 6 || i == 9 || i == 11) days_from_new_year += 30;
			else if(i == 2) days_from_new_year += 29;
		}
		days_from_new_year += day;
		int mod = days_from_new_year % 7;
		if(mod == 0) cout << "Wednesday";
		else if(mod == 1) cout << "Thursday";
		else if(mod == 2) cout << "Friday";
		else if(mod == 3) cout << "Saturday";
		else if(mod == 4) cout << "Sunday";
		else if(mod == 5) cout << "Monday";
		else if(mod == 6) cout << "Tuesday";
		cout << endl;
	}
	return 0;
}

C++: #include<bits/stdc++.h>
using namespace std;

int main() {
	int m, d;
	string week[] = { "Monday", "Tuesday", "Wednesday", "Thursday", "Friday",
			"Saturday", "Sunday" };
	int day[] = { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
	while (cin >> m >> d) {
		if (m == 0)break;
		bool flag=false;
		int mc = 1;
		int cnt = 3;
		while (1) {
			for (int i = 1; i < day[mc - 1]; ++i, cnt++) {
				if (mc == m && d == i) {
					cout << week[cnt % 7] << endl;
					flag=true;
					break;
				}
			}
			if(flag)break;
			mc++;
		}
	}
	return 0;
}

C++: #include <iostream>
using namespace std;

int calendar[12] = {31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};

int main() {
	int month, day;
	while (1) {
		int sum = 0;
		cin >> month >> day;
		if (month == 0) break;
		for (int i = 0; i < month - 1; i++) {
			sum += calendar[i];
		}
		sum += day;
		if (sum % 7 == 0) cout << "Wednesday" << endl;
		if (sum % 7 == 1) cout << "Thursday" << endl;
		if (sum % 7 == 2) cout << "Friday" << endl;
		if (sum % 7 == 3) cout << "Saturday" << endl;
		if (sum % 7 == 4) cout << "Sunday" << endl;
		if (sum % 7 == 5) cout << "Monday" << endl;
		if (sum % 7 == 6) cout << "Tuesday" << endl;
	}
	return 0;
}

C++: #include <iostream>
#include <iomanip>
#include <cassert>
#include <algorithm>
#include <functional>
#include <vector>
#include <string>
#include <cstring>
#include <stack>
#include <queue>
#include <map>
#include <bitset>
#include <sstream>
#include <istream>
#include <cmath>
#include <cstdio>

using namespace std;

#define vci vector<int>
#define vcs vector<string>
#define pb push_back
#define sz size()
#define mapci map<char, int>
#define mapsi map<string, int>
#define all(x) x.begin(), x.end()

#define for_(i, a, b) for (int i=(int)a; i<(int)b; i++)
#define for_d(i, a, b) for (int i=(int)a-1; i>=b; i--)
#define for_r(i, a, b, c) for (int i=(int)a; i<(int)b; i += c)
#define for_dr(i, a, b, c) for (int i=(int)a-1; i>=b; i -= c)
#define FOR(i,c) for(__typeof((c).begin())i=(c).begin();i!=(c).end();++i)

#define vcitr vector<int>::iterator
#define vcsitr vector<string>::iterator
#define mapcitr map<char, int>::iterator
#define mapsitr map<string, int>::iterator

typedef long long ll;

int iINF = 2147483647;
ll lINF = 9223372036854775807;

template <class T> inline void dbg(T t) { cout << t << endl; }

string day[7] = {"Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"};
int len[12] = {31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};

int main() {
	int x, y;
	
	while (cin >> x >> y) {
		if (x==0 && y==0) break;
		x--; y--;
		
		int ans = 3;
		for_(i, 0, x) for_(j, 0, len[i]) {
			ans++; ans %= 7;
		}
		cout << day[ans] << endl;
	}
	
	return 0;
}

C++: #include<iostream>
using namespace std;

int main(){
  int str[]={0,31,29,31,30,31,30,31,31,30,31,30,31};
  int mon,day;
  while(cin >>mon >>day){
    if(mon==0&&day==0)break;
    for(int i = 0 ; i < mon ; i++)
      day += str[i];
    day=day%7;
    if(day==0)cout<<"Wednesday"<<endl;
    else if(day==1)cout<<"Thursday"<<endl;
    else if(day==2)cout<<"Friday"<<endl;
    else if(day==3)cout<<"Saturday"<<endl;
    else if(day==4)cout<<"Sunday"<<endl;
    else if(day==5)cout<<"Monday"<<endl;
    else cout<<"Tuesday"<<endl;
  }
  return 0;
}

C++: #include <iostream>
#include <iomanip>
#include <vector>
#include <string>
#include <stack>
#include <queue>
#include <deque>
#include <set>
#include <map>
#include <algorithm>
#include <sstream>
#include <cstdlib>
#include <cstring>
#include <functional>
#include <numeric>
#include <cmath>
#include <climits>
#include <limits>
#include <cfloat>
#include <fstream>
using namespace std;

int main()
{
//	cut here before submit 
//	freopen("testcase.wdt", "r", stdin);
	// 2004/01/01 is Thursday
	const string week[] = {
	"Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday" };
	const int days[] = { 0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }; 
	string str = "";
	
	while (getline (cin, str ) ){
		int day, month;		
		stringstream ss(str);
		ss >> month >> day;
		if (month == 0 && day == 0){
			break;
		} // end if
		int num = 0;
		int i;
		for (i = 0; i < month; ++i){
			num += days[i];
		} // end for
		num += day;
//		cout << "num: " << num << endl;
		cout << week [( num - 1 ) % 7 + 3 ] << endl;
	} // end for
		
	return 0;
}