diff --git a/src/app/definition.cpp b/src/app/definition.cpp
index e474f44..5125421 100644
--- a/src/app/definition.cpp
+++ b/src/app/definition.cpp
@@ -72,16 +72,17 @@ char *lastIndexOf(char *str, const char character)
  * The monthNumTo3LetterAbbreviation function takes the month number from 1 to 12 and returns the abbreviation in a 3 letter
  * format.
  */
-char *monthNumTo3LetterAbbreviation(char *buffer, const uint8_t monthNumber)
+uint32_t monthNumTo3LetterAbbreviation(const uint8_t monthNumber)
 {
-   static const char monthArray[][4] = {{"Jan"},{"Feb"},{"Mar"},{"Apr"},{"May"},{"Jun"},{"Jul"},{"Aug"},{"Sep"},{"Oct"},{"Nov"},{"Dec"}};
-
-  if(buffer == NULL) return NULL;
+  /**
+   * This array contains months as 3 letter abbreviations
+   * Jan is written \0naJ and in hex : 0x006E614A an so on. They are thus 4Bytes aligned and easy to put and read back from prog mem :)
+   */
+  static const uint32_t PROGMEM monthArray[] = {0x6E614A, 0x626546, 0x72614D, 0x727041, 0x79614D, 0x6E754A, 0x6C754A, 0x677541, 0x706553, 0x74634F, 0x766f4E, 0x636544};
+  uint32_t toReturn(0x6E614A); //Default to Jan.
   
   if(monthNumber >= 1 && monthNumber <= 12)
-    strcpy_P(buffer, monthArray[monthNumber-1]);
-  else //If the month number is garbage, we return the first month of the year  
-    strcpy_P(buffer, monthArray[0]);
+    toReturn = monthArray[monthNumber - 1];
     
-  return buffer;
+  return toReturn;
 }
diff --git a/src/app/definition.h b/src/app/definition.h
index e2fc1f7..c192ec4 100644
--- a/src/app/definition.h
+++ b/src/app/definition.h
@@ -57,6 +57,6 @@ char *lastIndexOf(char *str, const char character);
 
 char *dateTimeFormater(char *pointer, const uint8_t value, const char character);
 
-char *monthNumTo3LetterAbbreviation(char *month, const uint8_t monthNumber);
+uint32_t monthNumTo3LetterAbbreviation(const uint8_t monthNumber);
 
 #endif //DEFINITION_H