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++: #define _CRT_SECURE_NO_WARNINGS
// #define _USE_MATH_DEFINES
#include <iostream>
#include <cstdio>
#include <algorithm>
#include <string>
#include <vector>
#include <map>
#include <set>
#include <stack>
#include <cmath>
#include <cstdlib>
#include <functional>
#include <locale>
#include <cctype>
#include <sstream>
#include <iomanip>    // 10????????? cout << setprecision(10) << double;
#include <queue>
using namespace std;

typedef long long LL;
typedef vector<int> VI;
typedef vector<VI> VVI;
typedef map<int, int> MAPII;
typedef multimap<int, char, greater<int> > MuMAPIC;
typedef vector<pair<int, int> > VPII;
typedef multimap<int, string, greater<int> > MuMIS;
typedef pair<int, int> P;
typedef pair<int, pair<P, P> > PP;

#define MP make_pair
#define FAST_IO  cin.tie(0); ios::sync_with_stdio(false);
#define FOR(i,a,b) for(int i=(a);i<(b);i++)
//for gcc (???test)
// #define FOREACH_IT(it,c) for(typeof(c)::iterator it=(c).begin(); it!=(c).end(); ++it)
//for Visual Studio
#define foreach_it(type,it,c) for(type::iterator it=c.begin(),c_end=c.end();it!=c_end;++it)
// for Debug.
#define DUMP_VVI(b) FOR(i,0,b.size()){FOR(j,0,b[i].size())printf("%d ",b[i][j]);puts("");}
#define D_OUT(str,value) if(dbgF){cout<<str<<" : "<<value<<endl;}
// ??\??????push_back(d)???array[d]???????????????1??????§?????????
// int INPUT_INT() {int d;cin>>d;return d;}
template<class T>T IN() { T d; cin >> d; return d; }
// ??????§????¢??´????°???Greatest Common Divisor???
LL gcd(LL a, LL b) { return (b > 0) ? gcd(b, a%b) : a; }
// ?????°?????¢??????°???Least Common Multiple???
LL lcm(LL a, LL b) { return a / gcd(a, b) * b; }
// Y???´???????????????´?????????
bool uruu(LL Y) { return (((Y % 4 == 0 && Y % 100 != 0) || Y % 400 == 0) ? true : false); }

// vector???¨???
// vec[i][j]?????????????\????????\?????????¨??????vec???????????????????????????????????????.

#define INF 1000000

// ------------------- include, typedef, define END. -------------------

int main() {

	int month = 0, day = 0;
	int daySum = 0;	// 1???1??\???????????\??°
	int month_days[12] = { 31,29,31,30,31,30,31,31,30,31,30,31 };
	string youbi[7] = { "Thursday","Friday","Saturday","Sunday","Monday","Tuesday","Wednesday" };
	while (cin >> month >> day, month|| day) {
		FOR(i, 0, month-1) {
			daySum += month_days[i];
		}
		daySum += (day - 1);

		cout << youbi[daySum%7] <<endl;
		daySum = 0;
	}

	return 0;
}

C++: #include <iostream>
using namespace std;
const string str[] = {"Wednesday","Thursday","Friday",
		      "Saturday","Sunday","Monday","Tuesday"};
const int m[] = {0,31,29,31,30,31,30,31,31,30,31,30,31};
int main(){
  int mon,day;
  while(cin >> mon >> day, mon + day){

    for(int i = 0 ; i < mon ; i++){
      day += m[i];
    }
    cout << str[day%7] << endl;
}
  return 0;
}

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

int main() {
    const char* day[] = {
        "Wednesday", "Thursday", "Friday", "Saturday", "Sunday", "Monday", "Tuesday",
    };
    const int daysPerMonth[] = {
        31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31,
    };
    int m, d;
    while (true) {
        cin >> m >> d;
        if (m == 0)
            break;

        int daysFromNewYear = d;
        for (int i = 0; i < m - 1; i++) {
            daysFromNewYear += daysPerMonth[i];
        }
        cout << day[daysFromNewYear % 7] << endl;
    }
}

C++: #include<iostream>
using namespace std;
int main(){
	int m=0,d=0,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:
				break;
			case 8:
				d=d+3;
				break;
			case 9:
				d=d+6;
				break;
			case 10:
				d=d+1;
				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<iostream>
using namespace std;
int main(){
int m,d,h,y;
char w[][7]={"Satur","Sun","Mon","Tues","Wednes","Thurs","Fri"};
for(;;){
y=4;
cin>>m>>d;
if(m==0)break;
if(m<3){m+=12;y--;}
h=(y+int(y/4)-35+int(2.6*(m+1))+d)%7;
cout<<h<<endl;
cout<<w[h]<<"day"<<endl;
}
return 0;
}

C++: #include <iostream>
#include <queue>
#include <stack>
#include <vector>
#include <stdio.h>
#include <algorithm>
#include <string.h>
#include <string>
using namespace std;

#define rep(i,n) for(int i=0;i<int(n);++i)

int m,d;

int main(){
	
	while(cin>>m>>d,!(m==0&&d==0)){
		if(m==2){
			d+=31;
		}
		if(m==3){
			d+=60;
		}
		if(m==4){
			d+=91;
		}
		if(m==5){
			d+=121;
		}
		if(m==6){
			d+=152;
		}
		if(m==7){
			d+=182;
		}
		if(m==8){
			d+=213;
		}
		if(m==9){
			d+=244;
		}
		if(m==10){
			d+=274;
		}
		if(m==11){
			d+=305;
		}
		if(m==12){
			d+=335;
		}
		d = d%7;
		if(d==0) cout<<"Wednesday\n";
		if(d==1) cout<<"Thursday\n";
		if(d==2) cout<<"Friday\n";
		if(d==3) cout<<"Saturday\n";
		if(d==4) cout<<"Sunday\n";
		if(d==5) cout<<"Monday\n";
		if(d==6) cout<<"Tuesday\n";
	}
	return 0;
	
}

C++: #include<iostream>
using namespace std;
int main(){
	int m=0,d=0,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+2;
				break;
			case 6:
				d=d+5;
				break;
			case 7:
				break;
			case 8:
				d=d+3;
				break;
			case 9:
				d=d+6;
				break;
			case 10:
				d=d+1;
				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;
		}
	}
}