diff --git a/src/plugins/Display/Display.h b/src/plugins/Display/Display.h
index b2c88b05..e263d667 100644
--- a/src/plugins/Display/Display.h
+++ b/src/plugins/Display/Display.h
@@ -9,6 +9,7 @@
 #include "../../hm/hmSystem.h"
 #include "../../hm/hmRadio.h"
 #include "../../utils/helper.h"
+#include "../plugin_lang.h"
 #include "Display_Mono.h"
 #include "Display_Mono_128X32.h"
 #include "Display_Mono_128X64.h"
diff --git a/src/plugins/Display/Display_Mono_128X64.h b/src/plugins/Display/Display_Mono_128X64.h
index c63f0b22..45e07e6f 100644
--- a/src/plugins/Display/Display_Mono_128X64.h
+++ b/src/plugins/Display/Display_Mono_128X64.h
@@ -93,7 +93,7 @@ class DisplayMono128X64 : public DisplayMono {
 
             // print Date and time
             if (0 != mDisplayData->utcTs)
-                printText(ah::getDateTimeStrShort(mDisplayData->utcTs).c_str(), l_Time, 0xff);
+                printText(ah::getDateTimeStrShort_i18n(mDisplayData->utcTs).c_str(), l_Time, 0xff);
 
             if (showLine(l_Status)) {
                 // alternatively:
@@ -145,7 +145,7 @@ class DisplayMono128X64 : public DisplayMono {
 
                     printText(mFmtText, l_TotalPower, 0xff);
                 } else {
-                    printText("offline", l_TotalPower, 0xff);
+                    printText(STR_OFFLINE, l_TotalPower, 0xff);
                 }
             }
 
diff --git a/src/plugins/Display/Display_Mono_84X48.h b/src/plugins/Display/Display_Mono_84X48.h
index b5daacd5..75a11207 100644
--- a/src/plugins/Display/Display_Mono_84X48.h
+++ b/src/plugins/Display/Display_Mono_84X48.h
@@ -78,7 +78,7 @@ class DisplayMono84X48 : public DisplayMono {
 
             // print Date and time
             if (0 != mDisplayData->utcTs)
-                printText(ah::getDateTimeStrShort(mDisplayData->utcTs).c_str(), l_Time, 0xff);
+                printText(ah::getDateTimeStrShort_i18n(mDisplayData->utcTs).c_str(), l_Time, 0xff);
 
             if (showLine(l_Status)) {
                 // alternatively:
@@ -111,7 +111,7 @@ class DisplayMono84X48 : public DisplayMono {
 
                     printText(mFmtText, l_TotalPower, 0xff);
                 } else {
-                    printText("offline", l_TotalPower, 0xff);
+                    printText(STR_OFFLINE, l_TotalPower, 0xff);
                 }
             }
 
diff --git a/src/plugins/plugin_lang.h b/src/plugins/plugin_lang.h
new file mode 100644
index 00000000..a5866af9
--- /dev/null
+++ b/src/plugins/plugin_lang.h
@@ -0,0 +1,18 @@
+//-----------------------------------------------------------------------------
+// 2024 Ahoy, https://ahoydtu.de
+// Creative Commons - http://creativecommons.org/licenses/by-nc-sa/4.0/deed
+//-----------------------------------------------------------------------------
+
+#ifndef __PLUGIN_LANG_H__
+#define __PLUGIN_LANG_H__
+#ifdef LANG_DE
+    #define STR_MONTHNAME_3_CHAR_LIST "ErrJanFebMrzAprMaiJunJulAugSepOktNovDez"
+    #define STR_DAYNAME_3_CHAR_LIST   "ErrSonMonDieMitDonFreSam"
+    #define STR_OFFLINE   "-- AUS --"
+#else
+    #define STR_MONTHNAME_3_CHAR_LIST "ErrJanFebMarAprMayJunJulAugSepOctNovDec"
+    #define STR_DAYNAME_3_CHAR_LIST   "ErrSunMonTueWedThuFriSat"
+    #define STR_OFFLINE   "offline"
+#endif
+
+#endif /*__PLUGIN_LANG_H__*/
\ No newline at end of file
diff --git a/src/utils/helper.cpp b/src/utils/helper.cpp
index 24a4d9ee..d5612e56 100644
--- a/src/utils/helper.cpp
+++ b/src/utils/helper.cpp
@@ -5,6 +5,7 @@
 
 #include "helper.h"
 #include "dbg.h"
+#include "../plugins/plugin_lang.h"
 
 namespace ah {
     void ip2Arr(uint8_t ip[], const char *ipStr) {
@@ -82,6 +83,37 @@ namespace ah {
         return String(str);
     }
 
+    #define dt_SHORT_STR_LEN_i18n  3 // the length of short strings
+    static char buffer[dt_SHORT_STR_LEN_i18n + 1];  // must be big enough for longest string and the terminating null
+    const char monthShortNames_P[] PROGMEM = STR_MONTHNAME_3_CHAR_LIST;
+    const char dayShortNames_P[] PROGMEM = STR_DAYNAME_3_CHAR_LIST;
+    char* monthShortStr_i18n(uint8_t month)
+    {
+        for (int i=0; i < dt_SHORT_STR_LEN_i18n; i++)
+            buffer[i] = pgm_read_byte(&(monthShortNames_P[i + month * dt_SHORT_STR_LEN_i18n]));
+        buffer[dt_SHORT_STR_LEN_i18n] = 0;
+        return buffer;
+    }
+
+    char* dayShortStr_i18n(uint8_t day)
+    {
+        for (int i=0; i < dt_SHORT_STR_LEN_i18n; i++)
+            buffer[i] = pgm_read_byte(&(dayShortNames_P[i + day * dt_SHORT_STR_LEN_i18n]));
+        buffer[dt_SHORT_STR_LEN_i18n] = 0;
+        return buffer;
+    }
+
+    String getDateTimeStrShort_i18n(time_t t) {
+        char str[20];
+        if(0 == t)
+            sprintf(str, "n/a");
+        else {
+            sprintf(str, "%3s ", dayShortStr_i18n(dayOfWeek(t)));
+            sprintf(str+4, "%2d.%3s %02d:%02d", day(t), monthShortStr_i18n(month(t)), hour(t), minute(t));
+        }
+        return String(str);
+    }
+
     uint64_t Serial2u64(const char *val) {
         char tmp[3];
         uint64_t ret = 0ULL;
diff --git a/src/utils/helper.h b/src/utils/helper.h
index 1dbba3d9..80a63f41 100644
--- a/src/utils/helper.h
+++ b/src/utils/helper.h
@@ -42,6 +42,7 @@ namespace ah {
     double round3(double value);
     String getDateTimeStr(time_t t);
     String getDateTimeStrShort(time_t t);
+    String getDateTimeStrShort_i18n(time_t t);
     String getDateTimeStrFile(time_t t);
     String getTimeStr(time_t t);
     String getTimeStrMs(uint64_t t);