diff --git a/ESPNTUhrPx.ino b/ESPNTUhrPx.ino
index 1424e4b..b6082c0 100644
--- a/ESPNTUhrPx.ino
+++ b/ESPNTUhrPx.ino
@@ -1,4 +1,4 @@
-#define VERSION (char *) "V2.17"
+#define VERSION (char *) "V2.19"
 
 /*
   V2.12 230205 neues SDK 8266; AP+Wifi Client; lokaleip eingebaut
@@ -7,6 +7,8 @@
   V2.15 230212 Verbesserung AP_STA modus;Wlan auf 1 Connect beschränkt;
   V2.16 230212 MaxConnect auf 2; Beacon auf 250ms
   V2.17 230227 alle unbekannten Seiten Leiten auf die IP um
+  V2.18 230313 Sommerzeitprüfung auch offline eingebaut; Auf doRTCSecond umgebaut;
+  V2.19 230327 Sommerzeit stellt die Uhr jetzt auch vor (nicht zurück); neues SDK
 */
 
 // Pins for LED MATRIX
@@ -71,7 +73,8 @@ char ChipID[10] = "ERROR";
 #include <RV-3029-C2.h>
   RV3029 rtc;
   const int PINRTC_CLOCK = 12;
-  boolean rtcEnabled = false;
+  bool rtcEnabled = false;
+  bool doRTCSecond = false;
   uint8_t temperature=0;
 
 #include <TimeLib.h>
@@ -87,7 +90,8 @@ char ChipID[10] = "ERROR";
   float brightness = 0.80;
   int8_t lastminutes = -1;
 
-  boolean iDL = false;
+  bool iDL = false;
+  bool savediDL = false;
 
   uint8_t lastTimeSyncTyp = 0;
   long lastTimeSyncTime = 0;
@@ -111,35 +115,21 @@ void display_update_enable(bool is_enable){
     display_ticker.detach();
 }
 
-//Led mit Helligkeit setzen
+//Led setzen
 void setPixelColor(uint8_t x,uint8_t y, uint8_t red, uint8_t green ,uint8_t blue){
-  /*red = ceil(red * brightness);
-  green = ceil(green * brightness);
-  blue = ceil(blue * brightness);*/
   display.drawPixelRGB888(x, y, red, green, blue);
-  //
 }
 
 //Zeichene eine Linie waagrecht x/y und z als länge
 void LineH(uint8_t  x, uint8_t y, uint8_t z, uint8_t red, uint8_t green ,uint8_t blue){
   uint16_t color = display.color565(red, green, blue);
   display.drawFastHLine(x,y,z,color);
-  //display.display(display_draw_time);
-  /*for(uint8_t c = 0; c<z; c++){
-    setPixelColor(x+c,y, red, green, blue);
-  }*/
-  //display.display(display_draw_time);
 }
 
 //Zeichene eine Linie senkrecht x/y und z als länge
 void LineV(uint8_t  x, uint8_t y, uint8_t z, uint8_t red, uint8_t green, uint8_t blue){
   uint16_t color = display.color565(red, green, blue);
   display.drawFastVLine(x,y,z,color);
-  //display.display(display_draw_time);
-  /*for(uint8_t c = 0; c<z; c++){
-    setPixelColor(x,y+c, red, green, blue);
-  }*/
-  //display.display(display_draw_time);
 }
 
 //eigene Schriften
@@ -149,17 +139,9 @@ void LineV(uint8_t  x, uint8_t y, uint8_t z, uint8_t red, uint8_t green, uint8_t
 #include <char10x16.h>
 
 void doClearLEDsSeconds(int8_t ycorrection=0){
-  
   for(uint8_t x=0;x<5;x++){
     display.drawFastHLine(56,26 + x + ycorrection, 7, 0);
   }
-  /*for(uint16_t x=56;x<MATRIX_WIDTH;x++){
-    for(uint16_t y=26;y<MATRIX_HEIGHT;y++){
-      display.drawPixelRGB888(x,y, 0, 0, 0);
-      //
-    }
-    //display.display(display_draw_time);
-  }*/
 }
 
 void doClearLEDsStatus(){
@@ -170,16 +152,6 @@ void doClearLEDsStatus(){
 
 void doClearLEDs(boolean incFirstLine = false){
   display.fillScreen(0);
-  /*if(incFirstLine)
-    display.clearDisplay();
-  else{
-    for(uint16_t x=0;x<MATRIX_WIDTH;x++){
-      for(uint16_t y=1;y<MATRIX_HEIGHT;y++){
-        display.drawPixelRGB888(x,y, 0, 0, 0);
-      }
-      //display.display(display_draw_time);
-    }
-  }*/
 }
 
 void showOVALZ(void){
@@ -212,22 +184,6 @@ void showNTOOLS(void){
   spalte += Out5x7Char('e',spalte,zeile,0,0,255)+1;
 }
 
-void show3x5(uint8_t x, uint8_t y, char text[] , uint8_t red, uint8_t green, uint8_t blue){
-  uint8_t textlen = strlen(text);
-  for(uint8_t b=0;b<textlen;b++){
-    x += Out3x5Char(text[b],x,y,red,green,blue)+1;
-  }
-  
-}
-
-void show5x7(uint8_t x, uint8_t y, char text[] , uint8_t red, uint8_t green, uint8_t blue){
-  uint8_t textlen = strlen(text);
-  for(uint8_t b=0;b<textlen;b++){
-    x += Out5x7Char(text[b],x,y,red,green,blue)+1;
-  }
-  
-}
-
 uint8_t drawTactical(time_t t,uint8_t x = 0, uint8_t y = 0 ){
   uint8_t r = tacticalTimeColor[0];
   uint8_t g = tacticalTimeColor[1];
@@ -388,12 +344,6 @@ void showTimeTactical(time_t t){
 
 void showTime(time_t t){
   uint16_t tmp = 0;
-  uint8_t x = 0;
-  uint8_t y = 0;
-
-  uint8_t r = timeColor[0];
-  uint8_t g = timeColor[1];
-  uint8_t b = timeColor[2];
   
   tmp =  minute(t);
   if(lastminutes != tmp){
@@ -494,9 +444,6 @@ uint16_t ACcolor = display.color565(255, 255, 255);
 uint16_t ACcolorBlk = display.color565(0, 0, 0);
 
 void drawAnalogSecond(int second){
-   //uint y = ((clock_radius-1)*cos(PI -(2*PI )/60*second))+clock_center_y;
-   //uint x = ((clock_radius-1)*sin(PI -(2*PI )/60*second))+clock_center_x;
-   //display.drawCircle(x, y, 1, 0x0ff000);
    uint y = ((clock_radius)*cos(PI-(2*PI)/60*second))+clock_center_y;
    uint x = ((clock_radius)*sin(PI-(2*PI)/60*second))+clock_center_x;
    display.drawLine(clock_center_x,clock_center_y,x,y,display.color565(255, 0, 0));
@@ -512,18 +459,13 @@ void drawAnalogHour(int hour, int minute){
   
   uint y = ((clock_radius-4)*cos(PI-(2*PI)/12*hour-(2*PI)/720*minute))+clock_center_y;
   uint x = ((clock_radius-4)*sin(PI-(2*PI)/12*hour-(2*PI)/720*minute))+clock_center_x;
-  //uint y1 = ((clock_radius-4)*cos(PI-(2*PI)/12*hour-(2*PI)/720*minute))+clock_center_y+1;
-  //uint x1 = ((clock_radius-4)*sin(PI-(2*PI)/12*hour-(2*PI)/720*minute))+clock_center_x+1;
   uint y2 = ((clock_radius-4)*cos(PI-(2*PI)/12*hour-(2*PI)/720*minute))+clock_center_y-1;
   uint x2 = ((clock_radius-4)*sin(PI-(2*PI)/12*hour-(2*PI)/720*minute))+clock_center_x-1;
   display.drawLine(clock_center_x,clock_center_y,x,y,display.color565(88, 255, 0));
-  //display.drawLine(clock_center_x+1,clock_center_y+1,x1,y1,display.color565(88, 255, 0)); 
   display.drawLine(clock_center_x-1,clock_center_y-1,x2,y2,display.color565(88, 255, 0)); 
 }
 
 void drawAnalogFace(void){
-  // draw the center of the clock
-  //display.drawCircle(clock_center_x, clock_center_y,3, ACcolor);
   display.fillCircle(clock_center_x, clock_center_y,2, ACcolor);
 
   // draw hour pointers around the face of a clock
@@ -641,10 +583,7 @@ void doSetTime(unsigned long t){
 
 void IRAM_ATTR rtc_clock(){ //Interrupt vom RTC
   if(digitalRead(PINRTC_CLOCK)){
-    ti_second = millis() - 1020;
-    //display.drawPixelRGB888(4,0,0,255,0);
-  }else{
-    //display.drawPixelRGB888(4,0,0,0,0);
+    doRTCSecond = true;
   }
 }
 
@@ -661,6 +600,33 @@ uint8_t isDayLight(uint8_t hour, uint8_t day, uint8_t wday, uint8_t month){
   return 1;
 }
 
+uint8_t isDayLightEx(void){
+  long currentUNIXTime = now();
+  byte Month, Day, Hour, WDay;
+  Month = month(currentUNIXTime);
+  Day = day(currentUNIXTime);
+  Hour = hour(currentUNIXTime);
+  WDay = weekday();
+  return isDayLight(Hour,Day,WDay,Month);
+}
+
+void checkiDL(void){
+  iDL = isDayLightEx();
+  if(iDL != savediDL){
+    long currentUNIXTime = now();
+    if(iDL){
+      currentUNIXTime += (SECS_PER_HOUR);
+    }else{
+      currentUNIXTime -= (SECS_PER_HOUR);
+    }
+    setTime(currentUNIXTime);
+    doSetTime(currentUNIXTime);
+    savediDL = iDL;
+    EEPROM.put(10, savediDL);
+    EEPROM.commit();
+  }
+}
+
 //NTP Update auf ganz lange
 uint32_t sntp_update_delay_MS_rfc_not_less_than_15000 (){
   return 365 * 24 * 60 * 60 * 1000UL; // 365 Tage
@@ -688,6 +654,8 @@ void setup() {
   if(brightness > 1.0)
     brightness = 1.0;
 
+  EEPROM.get(10, savediDL);
+
   timeColor[0] = EEPROM.read(11);
   timeColor[1] = EEPROM.read(12);
   timeColor[2] = EEPROM.read(13);
@@ -709,7 +677,6 @@ void setup() {
   EEPROM.get(151,appass);
 
   display.begin(16);
-  //display.setBrightness(255);
   display.setBrightness(ceil(255 * brightness));
   display.setFastUpdate(true);
   doClearLEDs(true);
@@ -719,7 +686,6 @@ void setup() {
   display_update_enable(true);
 
   Wire.begin(1,3);
-  //Wire.setClock(400000);
   //RTC
   if (rtc.begin() == false) {
     display.drawPixelRGB888(0,0,255,0,0);
@@ -731,15 +697,7 @@ void setup() {
     rtcEnabled = true;
     pinMode(PINRTC_CLOCK, INPUT_PULLUP); 
     setTime(rtc.getUNIX());
-    long currentUNIXTime = now();
-    byte Month, Day, Hour, Minute, Second, WDay;
-    Month = month(currentUNIXTime);
-    Day = day(currentUNIXTime);
-    Hour = hour(currentUNIXTime);
-    Minute = minute(currentUNIXTime);
-    Second = second(currentUNIXTime);
-    WDay = weekday();
-    iDL = isDayLight(Hour,Day,WDay,Month);
+    checkiDL();
   }
 
   char NetName[30];
@@ -749,9 +707,7 @@ void setup() {
     strcpy(APName, "NTUhr VPx ");
     strcat(APName, ChipID);
 
-  
   WiFi.persistent(false);
-  WiFi.mode(WIFI_AP_STA);
   WiFi.begin(ssid,pass);
   WiFi.hostname(NetName);
   int xc = 0;
@@ -791,21 +747,25 @@ void setup() {
     }
     if(timenow > SECS_YR_2000){
       timenow += 1;
-      int Year;
-      byte Month, Day, Hour;
+      uint8_t Month, Day, Hour;
       setTime(timenow);
-      Year = year(timenow);
+      Month = month(timenow);
       Day = day(timenow);
       Hour = hour(timenow);
-      if(isDayLight(Hour,Day,weekday(),Month))
+      iDL = isDayLight(Hour,Day,weekday(),Month);
+      if(iDL)
         timenow += (SECS_PER_HOUR * 2);
       else
         timenow += (SECS_PER_HOUR);
+      setTime(timenow);
       if(rtcEnabled){
         doSetTime(timenow);
       }
       lastTimeSyncTyp = 2;
       lastTimeSyncTime = timenow;
+      savediDL = iDL;
+      EEPROM.put(10, savediDL);
+      EEPROM.commit();
       display.drawPixelRGB888(2,0,0,255,0);
       display_doupdate();
     }else{
@@ -829,7 +789,6 @@ void setup() {
     
     delay(100);
     WiFi.softAPConfig(ip_local, ip_gateway, ip_subnet);
-    //appass = ;
     APEnabled = WiFi.softAP(APName, appass,2,0,2,250);
     if(!APEnabled)
       display.drawPixelRGB888(3,0,255,0,0);
@@ -843,13 +802,6 @@ void setup() {
   
   display_doupdate();
   
-  //für die automatische Umleitung
-  /*webServer.on("/generate_204", HTTP_GET, [](AsyncWebServerRequest *request){html_root(request);});    //Android captive portal.
-  webServer.on("/fwlink",  HTTP_GET, [](AsyncWebServerRequest *request){html_root(request);});   //Microsoft captive portal.
-  webServer.on("/connecttest.txt",  HTTP_GET, [](AsyncWebServerRequest *request){html_root(request);}); //www.msftconnecttest.com
-  webServer.on("/hotspot-detect.html",  HTTP_GET, [](AsyncWebServerRequest *request){html_root(request);}); //captive.apple.com
-  webServer.on("/success.txt",  HTTP_GET, [](AsyncWebServerRequest *request){html_handle_success(request);}); //detectportal.firefox.com/sucess.txt
-  webServer.on("/redirect",  HTTP_GET, [](AsyncWebServerRequest *request){html_root(request);});   //Microsoft captive portal.*/
   webServer.onNotFound([](AsyncWebServerRequest *request){html_handle_notsuccess(request);});
   
   //eigene Seiten
@@ -871,28 +823,22 @@ void setup() {
 void loop(){
   if (millis() - ti_second > 1000) {
     ti_second = millis();
+  }
+  if(doRTCSecond){
+    doRTCSecond = false;
     if((timeStatus() != timeNotSet)){
       time_t currentUNIXTime = now();
       if(rtcEnabled){
         currentUNIXTime = rtc.getUNIX();
         setTime(currentUNIXTime);
       }
-      byte Month, Day, Hour, Minute, Second, WDay;
-      Month = month(currentUNIXTime);
-      Day = day(currentUNIXTime);
+      uint8_t Hour, Minute, Second, WDay;
       Hour = hour(currentUNIXTime);
       Minute = minute(currentUNIXTime);
       Second = second(currentUNIXTime);
       WDay = weekday();
-      if((isDayLight(Hour,Day,WDay,Month) != iDL) && (((Month == 10) & (Hour >= 3)) | (Month == 3))){
-        if(iDL){
-          doSetTime(currentUNIXTime - SECS_PER_HOUR);
-        }else{
-          doSetTime(currentUNIXTime + SECS_PER_HOUR);
-        }
-        iDL = isDayLight(Hour,Day,WDay,Month);
-      }
-      //Sonntag und NTP = Reset ..
+      checkiDL();
+      //Sonntag Reset ..
       if((WDay == 1) && (Hour == 3) && (Minute == 1) && (Second == 0)){
         ESP.restart();
       }
@@ -922,8 +868,8 @@ void loop(){
     }
     rtc.getTEMPERATURE(&temperature);
   }
-  dnsServer.processNextRequest();
-  //yield();
+  if(APEnabled)
+    dnsServer.processNextRequest();
 }
 
 //alles was WEB ist ...
@@ -1006,6 +952,9 @@ void html_poll(AsyncWebServerRequest *request) {
       itoa(kw,tempBuff,DEC);
       strcat(ret,(char *)","); 
       strcat(ret,tempBuff);
+      itoa(iDL,tempBuff,DEC);
+      strcat(ret,(char *)","); 
+      strcat(ret,tempBuff);
     strcat(ret,(char *)"]");  
 	  request->send(200, "text/plain", ret); 
 }
@@ -1021,6 +970,16 @@ void html_do(AsyncWebServerRequest *request) {
       doSetTime(l_value);
       lastTimeSyncTyp = 3;
       lastTimeSyncTime = now();
+      //isDayLight (Sommerzeit) prüfen
+      uint8_t Month, Day, Hour;
+      setTime(l_value);
+      Month = month(l_value);
+      Day = day(l_value);
+      Hour = hour(l_value);
+      iDL = isDayLight(Hour,Day,weekday(),Month);
+      savediDL = iDL;
+      EEPROM.put(10, savediDL);
+      EEPROM.commit();
     }else if(request->hasParam(PARAM_SHOWWHAT)) {
 	    s_value = request->getParam(PARAM_SHOWWHAT)->value();
 	    timeIndex = s_value.toInt();
@@ -1138,13 +1097,4 @@ char * html_processor(const String& var){
     return localip;
   }
   return (char *) "not defined";
-}
-
-String toggleState(int toggle){
-  switch(toggle){
-    case 0:
-      
-    break;
-  }
-  return "";
 }
\ No newline at end of file
diff --git a/index_html.h b/index_html.h
index 27e0944..738cd66 100644
--- a/index_html.h
+++ b/index_html.h
@@ -228,6 +228,10 @@ const char html_page_index[] PROGMEM = R"rawliteral(
 				<input id="withSeconds" type='checkbox' onclick="return false" readonly>
 				<label for="withSeconds">Sekunden zeigen</label>
 			</span>
+      <span class="wsnw">
+				<input id="isSummerTime" type='checkbox' onclick="return false" readonly>
+				<label for="isSummerTime">Sommerzeit</label>
+			</span>
       <span class="wsnw">
 				<input id="alwaysAccessPoint" type='checkbox' onclick="return false" readonly>
 				<label for="alwaysAccessPoint">AccessPoint erstellen auch bei erfolgreicher WiFi Verbindung</label>
@@ -422,6 +426,7 @@ const char html_page_index[] PROGMEM = R"rawliteral(
         colorString = "#" + data[13].toString(16).padStart(6, '0');
         document.getElementById('actKW').style.color = colorString;	
         document.getElementById('actKW').innerHTML = "KW " + data[14];
+        document.getElementById("isSummerTime").checked = (data[15] == 1);
       }catch(e){
         console.log(e);
       }