Part of my <AC 0.02s> C++ code:

// 1201
#include <iostream.h>
#include <math.h> //for some calculations ;)

int d,m,y;

// Here are your subroutines

int main() {
  int flg=0;
  int i,j,lim,k=0;
  int a[10][10];
  char *w[]={"mon","tue","wed","thu","fri","sat","sun"};

  cin>>d>>m>>y;

  for (i=0;i<10;i++)
    for (j=0;j<10;j++) a[i][j]=0;

  // Here you put your data in a double array

  for (i=0;i<7;i++) {
    cout<<w[i];
    for (j=0;j<6;j++)
      if (a[i][j])
    if (a[i][j]==d) {
      if (d>9) cout<<" ["<<d<<"] ";
      else cout<<" [ "<<d<<"] ";
      flg=j<4;
    }
    else
      if (flg) {
        if (a[i][j]>9) cout<<" "<<a[i][j]<<" ";
        else cout<<"  "<<a[i][j]<<" ";
        flg=0;
      }
      else
        if (a[i][j]>9) cout<<"  "<<a[i][j]<<" ";
        else cout<<"   "<<a[i][j]<<" ";
    else cout<<"     ";
    cout<<endl;
  }
  return 0;
}