src/share/classes/sun/text/resources/sk/FormatData_sk.java

*** 136,145 ****
--- 136,156 ----
                      "\u0160t", // abb Thursday
                      "Pi", // abb Friday
                      "So" // abb Saturday
                  }
              },
+             { "DayNarrows",
+                 new String[] {
+                     "N",
+                     "P",
+                     "U",
+                     "S",
+                     "\u0160",
+                     "P",
+                     "S",
+                 }
+             },
              { "Eras",
                  new String[] { // era strings
                      "pred n.l.",
                      "n.l."
                  }