Datum wird nicht mehr richtig angezeigt

International Deutsch
12 
#include <Arduino.h>
#include <ESP8266WiFi.h>
#include <ESP8266HTTPClient.h>
#include <WiFiClient.h>

#include <NTPClient.h>
#include <WiFiUdp.h>

 
const char* ssid = "***";
const char* pass =  "***";



WiFiClient client;


//Zeitverschiebung UTC <-> MEZ (Winterzeit) = 3600 Sekunden (1 Stunde)
//Zeitverschiebung UTC <-> MEZ (Sommerzeit) = 7200 Sekunden (2 Stunden)
const long utcOffsetInSeconds = 3600;

//Week Day
String weekDays[7]={"Sonntag", "Montag", "Dienstag", "Mittwoch", "Donnerstag", "Freitag", "Samstag"};

//Month names
String months[12]={"Jan", "Feb", "Mar", "Apr", "Mai", "Jun", "Jul", "Aug", "Sep", "Okt", "Nov", "Dez"};

WiFiUDP ntpUDP;
NTPClient timeClient(ntpUDP, "pool.ntp.org", utcOffsetInSeconds);

void setup() {

  Serial.begin(115200);
 
  WiFi.begin(ssid, pass);
 
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.print(".");
  }
 
  Serial.println(F("Connected to the WiFi network"));

  delay(2000);
  
  timeClient.begin();
  timeClient.setTimeOffset(3600);
   

}
 
void loop() {

bool sync = timeClient.update();
  if (sync) {
    
  unsigned long epochTime = timeClient.getEpochTime();
  struct tm *ptm = gmtime ((time_t *)&epochTime);

  int monthDay = ptm->tm_mday;
//  Serial.print(F("Tag: ")); Serial.println(monthDay);

  int currentMonth = ptm->tm_mon+1;
//  Serial.print(F("Monat: ")); Serial.println(currentMonth);

  String currentMonthName = months[currentMonth-1];
//  Serial.print(F("Monat name: ")); Serial.println(currentMonthName);

  int currentYear = ptm->tm_year+1900;
//  Serial.print("Jahr: "); Serial.println(currentYear);

  String weekDay = weekDays[timeClient.getDay()];
//  Serial.print("Week Day: "); Serial.println(weekDay);  

  String currentDate = String(weekDay) + "   " + String(monthDay) + "-" + String(currentMonth) + "-" + String(currentYear);
  Serial.print(currentDate);
  
  Serial.print(F("  "));
  Serial.println(timeClient.getFormattedTime());
  }
delay(3000);
}