-Calendar._TT["MON_FIRST"] = "Display Monday first";
-Calendar._TT["SUN_FIRST"] = "Display Sunday first";
+
+// the following is to inform that "%s" is to be the first day of week
+// %s will be replaced with the day name.
+Calendar._TT["DAY_FIRST"] = "Display %s first";
+
+// This may be locale-dependent. It specifies the week-end days, as an array
+// of comma-separated numbers. The numbers are from 0 to 6: 0 means Sunday, 1
+// means Monday, etc.
+Calendar._TT["WEEKEND"] = "0,6";
+