diff --git a/src/app/definition.cpp b/src/app/definition.cpp
index 0d39331..e474f44 100644
--- a/src/app/definition.cpp
+++ b/src/app/definition.cpp
@@ -68,7 +68,10 @@ char *lastIndexOf(char *str, const char character)
   return last;
 }
 
-
+/**
+ * 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)
 {
    static const char monthArray[][4] = {{"Jan"},{"Feb"},{"Mar"},{"Apr"},{"May"},{"Jun"},{"Jul"},{"Aug"},{"Sep"},{"Oct"},{"Nov"},{"Dec"}};
@@ -77,7 +80,7 @@ char *monthNumTo3LetterAbbreviation(char *buffer, const uint8_t monthNumber)
   
   if(monthNumber >= 1 && monthNumber <= 12)
     strcpy_P(buffer, monthArray[monthNumber-1]);
-  else //Default is january  
+  else //If the month number is garbage, we return the first month of the year  
     strcpy_P(buffer, monthArray[0]);
     
   return buffer;