Go: package main

import (
        "fmt"
)

func main() {
        var weeks = []string{"Thursday",
                "Friday",
                "Saturday",
                "Sunday",
                "Monday",
                "Tuesday",
                "Wednesday"}

        for {
                var m, d int
                _, err := fmt.Scanf("%d %d", &m, &d)
                if err != nil || m + d == 0 {
                        break
                }
                var days int

                for {
                        lm, ld := getLastDay(m, d)
                        if lm + ld == 0 {
                                break
                        }
                        days++
                        m = lm
                        d = ld
                }
                fmt.Println(weeks[days%7])
        }
}

func getLastDay(m int, d int) (lm int, ld int) {
        if m == 1 && d == 1 {
                return 0, 0
        }

        if d > 1 {
                return m, d-1
        } else {
                if m == 3 {
                        return m-1, 29
                }
                if m == 3 || m == 5 || m == 7 || m == 10 || m == 12 {
                        return m-1, 30
                } else {
                        return m-1, 31
                }
        }
}

C++: #include <iostream>
#include <string>

using namespace std;

int days[13] = {0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};

int main(void) {
    int M, D;
    while(1) {
        int elapsed = 0;
        cin >> M >> D;

        if(M == 0 && D == 0) break;

        for(int i = 1; i < M; i++) elapsed += days[i];

        elapsed += D;

        int t = elapsed % 7;

        if(t == 1) {
            cout << "Thursday" << endl;
        } else if(t == 2) {
            cout << "Friday" << endl;
        } else if(t == 3) {
            cout << "Saturday" << endl;
        } else if(t == 4) {
            cout << "Sunday" << endl;
        } else if(t == 5) {
            cout << "Monday" << endl;
        } else if(t == 6) {
            cout << "Tuesday" << endl;
        } else {
            cout << "Wednesday" << endl;
        }
    }
    return 0;
}

C++: #include <bits/stdc++.h>
using namespace std;
int main(){
  long long a,b,cnt,mon[12]={0,31,29,31,30,31,30,31,31,30,31,30};
  string day[7]={"Wednesday","Thursday","Friday","Saturday","Sunday","Monday","Tuesday"};
  while(cin >> a >> b){
    if(a==0 and b==0){
      break;
    }
    cnt=b;
    for(int i=0;i<a;i++){
      cnt+=mon[i];
    }
    cout << day[cnt%7] << endl;
  }
  return 0;
}

C++: #include<iostream>
using namespace std;
main(){
	int month[12]={31,29,31,30,31,30,31,31,30,31,30,31};
	string day[7]={"Wednesday","Thursday","Friday","Saturday","Sunday","Monday","Tuesday"};
	int n[2];
	while(cin>>n[0]>>n[1],n[0],n[1]){
		int sum=0;
		for(int i=0;i<n[0]-1;++i){
			sum+=month[i];
		}
		sum+=n[1];
		cout<<day[sum%7]<<endl;
	}
}

C++: //#include <bits/stdc++.h>
#include <iostream>
#include <cstdio>
#include <math.h>
#include<algorithm>
#include <utility>
using namespace std;
int main() {//Thursda,Friday...0,1,2,3,4,5,6
	int month,day, today;//31%7=3
	int add=0;
	while (1) {
		cin >> month >> today;
		if (month == 0) {
			break;
		}
		if (month == 1) {
			add = 0;
		}
		else {
			for (int i = 1; i < month; i++) {
				if (i == 2) {
					add+=1;
				}
				else if (i % 2 == 0 && i < 8 || i == 11) {
					add += 2;
				}
				else {
					add += 3;
				}
			}
		}
		today += add;
		day = today%7;
		cout << add << endl;
		switch (day) {
		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;
		case 0:cout << "Wednesday" << endl; break;
		}
		add = 0;
	}
	return 0;
}

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

int main(){
	
	int m,d;
	string week[7]={
		"Sunday",
		"Monday",
		"Tuesday",
		"Wednesday",
		"Thursday",
		"Friday",
		"Saturday"
	};
	int month[13]={
		-1,3,6,0,3,5,1,3,6,2,4,0,2
	};
	while(cin>>m>>d,m){
		cout<<week[(month[m]+d)%7]<<endl;
	}
	
	return 0;
}

C++: #include <stdio.h>

int main()
{
	char week[7][10]={"Monday","Tuesday","Wednesday","Thursday","Friday","Saturday","Sunday"};
	int month,day;
	int numday[12] = { 31,29,31,30,31,30,31,31,30,31,30,31 };
	int i;

	while((scanf("%d%d", &month, &day)) != EOF)
	{
		if (month == 0) break;
		for (i = 0; i < month -1; i++)
		{
			day += numday[i];
		}
		day = (day + 2)%7 ;
		printf("%s\n", week[day]);
	}
	return 0;
}

C++: #include<iostream>
#include<string>

int main()
{
	const char* StartOfYear = "Thursday";

	const char* Youbi[]=
	{
		"Sunday",
		"Monday",
		"Tuesday",
		"Wednesday",
		"Thursday",
		"Friday",
		"Sunday"
	};

	int NumYoubi = -1;

	for(size_t i=0; i<7; ++i)
	{
		if(Youbi[i]==StartOfYear)
		{
			NumYoubi = i;
		}
	}

	if(NumYoubi==-1)
	{
		std::cout << "Youbi set error!\n";

		exit(1);
	}

	const int dayMaxSum[13] = 
	{
		0,
		31,
		60,
		91,
		121,
		152,
		182,
		213,
		244,
		274,
		305,
		335,
		366
	};

	int month=1,day=0,daySum=0;//month=0で終了するため1で初期化

	while(std::cin >> month >> day && month!=0)
	{
		daySum = dayMaxSum[month-1]+day;

		std::cout << Youbi[(daySum-1+NumYoubi)%7];//daySum-1で周期があう 1/1…7で割ったあまりが0 NumYoubiで位相ズレ（1/1の曜日）を表す

		std::cout << '\n';

		daySum=0;
	}
}

C++: #include <cstdio>
#include <string>
using namespace std;

int m;
int d;
string days[] = {"Monday","Tuesday","Wednesday","Thursday","Friday","Saturday","Sunday"};

int GetNumDay(int m) {
  switch (m) {
  case 2:
    return 29;
  case 4:
  case 6:
  case 9:
  case 11:
    return 30;
  default:
    return 31;
  }
}

int main() {
  while (1) {
    scanf("%d%d", &m, &d);
    if (m == 0 && d == 0) return 0;

    int tot = d-1;
    for (int i=1; i<m; i++) {
      tot += GetNumDay(i);
    }

    puts(days[(3+tot)%7].c_str());
  }
}

C++: #include<bits/stdc++.h>
#include<vector>
#include<list>
#include<stack>
#include<queue>
#include<algorithm>
#include<map>
using namespace std;

int main(){
    int mod=1000000007;
    int m,d;
    int p[13]={0,31,29,31,30,31,30,31,31,30,31,30,31};
    map<int, string> week;
    week[0]="Monday";
    week[1]="Tuesday";
    week[2]="Wednesday";
    week[3]="Thursday";
    week[4]="Friday";
    week[5]="Suturday";
    week[6]="Sunday";
    for (;;){
        scanf("%d %d",&m,&d);
        if (d==0) break;
        int tmp=3;
        if (m>1) {
            for (int i=1;i<m;i++) {
                tmp=(tmp+p[i])%7;
            }
        }
        cout<<week[(tmp+d-1)%7]<<endl;
    }
    return 0;
}

C++: #include<iostream>
#include<string>

int monthes[]={0,31,29,31,30,31,30,31,31,30,31,30,31};

std::string day[]={"Wednesday","Thursday","Friday","Saturday","Sunday","Monday","Tuesday"};

int main(void){
    int m,d,n;
    while(std::cin>>m>>d){
        if(m==0&&d==0) break;
        n=0;
        int i;
        for(i=1;i<m;i++) n+=monthes[i];
        n+=d
        std::cout<<day[n%7]<<std::endl;
    }
    return 0;
}

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

int main(){
	char* date[] = {"Wednesday", "Thursday", "Friday", "Saturday", "Sunday", "Monday", "Tuesday"};
	int months[] = {31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
	int m,d;
	while( cin >> m >> d, m ){
		int day=0;
		for( int i=0; i<m-1; i++ ){
			day += months[i];
		}
		day += d;
		cout << date[day%7] << endl;
	}
	return 0;
}

C++: #include <iostream>
#include <vector>
#include <string>

#define YEAR 2004

using namespace std;

int main() {
	vector<string> week;
	week.push_back("Sunday");
	week.push_back("Monday");
	week.push_back("Tuesday");
	week.push_back("Wednesday");
	week.push_back("Thursday");
	week.push_back("Friday");
	week.push_back("Saturday");
	int m,d,w;
	while(cin>>m>>d){
		w = (YEAR + YEAR/4 - YEAR/100 + YEAR/400 + (13*m+8)/5 + d) % 7;
		cout<<week.at(w)<<endl;
	}
	return 0;
}