Editing option In Websever

I could not able to blink led 4 . How can change local date , time on web server.

#include <SPI.h>
#include <Ethernet.h>
String readString;
int led = 4;
byte mac[] = { 
  0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
IPAddress ip(192,168,7, 150);
EthernetServer server(80);
int local_day=12;
int local_month=04;
int local_year=2014;
int local_h=12;
int local_m=30;
int local_s=21;
float latitude=15.08;
float longitude=58.05;
float tracker_des_angle=45.0;
float tracker_actual_pos=43.0;
int Wind_Speed=12;
int Wind_Kmph=120;

void setup()
{

  Serial.begin(9600);
  while (!Serial) {
    ; // wait for serial port to connect. Needed for Leonardo only
  }


  // start the Ethernet connection and the server:
  Ethernet.begin(mac, ip);
  server.begin();
  Serial.print("server is at ");
  Serial.println(Ethernet.localIP());



}
void loop()
{
  Ethernet_webserver();
}


void Ethernet_webserver()
{
  EthernetClient client = server.available();
  if (client) 
  {
    boolean currentLineIsBlank = true;
    while (client.connected()) 
    {
      if (client.available())
      {
        char c = client.read();
        if (c == '\n' && currentLineIsBlank)
        {
          client.println("HTTP/1.1 200 OK");
          client.println("Content-Type: text/html");
          client.println("Connnection: close");
          client.println();
          client.println("<!DOCTYPE HTML>");
          client.println("<html>");
          // add a meta refresh tag, so the browser pulls again every 5 seconds:
          client.println("<meta http-equiv=\"refresh\" content=\"5\">");
          client.println("<TITLE>NAVYA TITLE </TITLE>");
          client.println("</HEAD>");
          client.println("<BODY>");
          client.println("<H1>NAVYA TITLE </H1>");
          client.println("<hr />");
          client.println("
");  
          client.println("<H2>NAVYA TRACKER PROJECT </H2>");
          client.println("
");  
          client.println("<a href=\"/?button1on\"\">Turn On LED</a>");
          client.println("<a href=\"/?button1off\"\">Turn Off LED</a>
");   
          client.println("
");     
          client.println("
"); 

          /*
          client.println("<!DOCTYPE HTML>");
           client.println("<html>");*/
          // add a meta refresh tag, so the browser pulls again every 5 seconds:
          //  client.println("<meta http-equiv=\"refresh\" content=\"5\">");
          // add sententence here
          client.print("LOCAL DATE :"); 
          client.print(local_day);
          client.print("/");
          client.print(local_month);
          client.print("/");
          client.print(local_year); 
          client.println("
");   
          client.print("LOCAL TIME :"); 
          client.print(local_h);
          client.print("/");
          client.print(local_m);
          client.print("/");
          client.print(local_s); 
          client.println("
");   
          client.print("LATITUDE :");
          client.print(latitude); 
          client.print("
");   
          client.print("LONGITUDE :");
          client.print(longitude); 
          client.println("
");   
          client.print("DESIRED ANGLE:");
          client.print(tracker_des_angle); 
          client.println("
");   
          client.print("ACTUAL ANGLE:");
          client.print(tracker_actual_pos); 
          client.println("
");   
          client.print("WIND SPEED M/S:");
          client.print(Wind_Speed); 
          client.println("
");   
          client.print("WIND SPEED KMPH:");
          client.print(Wind_Kmph); 
          client.println("
");   

          client.println("</html>");
          //break;
        }
        if (c == '\n') {
          // you're starting a new line
          currentLineIsBlank = true;
          if (readString.indexOf("?button1on") >0){
            digitalWrite(led, HIGH);
          }
          if (readString.indexOf("?button1off") >0){
            digitalWrite(led, LOW);
          }
          readString="";  
        } 
        else if (c != '\r') {
          // you've gotten a character on the current line
          currentLineIsBlank = false;
        }
      }
    }
    // give the web browser time to receive the data
    delay(1);
    // close the connection:
    client.stop();

    Serial.println("client disonnected");


  }
}