diff --git a/src/common/intl.cpp b/src/common/intl.cpp
index f8b011a917..7c77e16b98 100644
--- a/src/common/intl.cpp
+++ b/src/common/intl.cpp
@@ -1251,6 +1251,8 @@ static wxString TranslateFromUnicodeFormat(const wxString& fmt)
                             fmtWX += "%A";
                             break;
                         case 5: // EEEEE
+                        case 6: // EEEEEE
+                            // no "narrow form" in strftime(), use abbrev.
                             fmtWX += "%a";
                             break;
 
@@ -1276,6 +1278,11 @@ static wxString TranslateFromUnicodeFormat(const wxString& fmt)
                             fmtWX += "%B";
                             break;
 
+                        case 5:
+                            // no "narrow form" in strftime(), use abbrev.
+                            fmtWX += "%b";
+                            break;
+
                         default:
                             wxFAIL_MSG( "too many 'M's" );
                     }