src/share/classes/sun/text/resources/pl/FormatData_pl.java

*** 119,128 ****
--- 119,139 ----
                      "Cz", // abb Thursday
                      "Pt", // abb Friday
                      "So" // abb Saturday
                  }
              },
+             { "DayNarrows",
+                 new String[] {
+                     "N",
+                     "P",
+                     "W",
+                     "\u015a",
+                     "C",
+                     "P",
+                     "S",
+                 }
+             },
              { "Eras",
                  new String[] { // era strings
                      "p.n.e.",
                      "n.e."
                  }