Something

awk 'BEGIN { "/$mes $dia/ && /Acepted/" /var/log/secure                                                                                        
             print ""                                                                                                                          
             print "Mes  Dia     Hora     User       Desde         Protocolo"                                                                  
             print "---  ---    ------    ----       -----         ---------" }                                                                
           { print $1, " ", $2, " ", $3, " ", $9, " ", $11, "   ", $14}                                                                        
     END   { print "" }'