diff --git a/source/Ox.UI/js/Calendar/Calendar.js b/source/Ox.UI/js/Calendar/Calendar.js
index 35113b00..5c87d555 100644
--- a/source/Ox.UI/js/Calendar/Calendar.js
+++ b/source/Ox.UI/js/Calendar/Calendar.js
@@ -152,8 +152,8 @@ Ox.Calendar = function(options, self) {
             },
             name: function(i) {
                 return i > -2
-                    ? Ox._('{0} Millennium', Ox.formatOrdinal(i + 2))
-                    : Ox._('{0} Millennium BC', Ox.formatOrdinal(-i - 1))
+                    ? Ox._('{0} Millennium', [Ox.formatOrdinal(i + 2)])
+                    : Ox._('{0} Millennium BC', [Ox.formatOrdinal(-i - 1)])
             },
             value: function(date) {
                 return Math.floor(date.getUTCFullYear() / 1000) - 1;
@@ -167,8 +167,8 @@ Ox.Calendar = function(options, self) {
             },
             name: function(i) {
                 return i > -20
-                    ? Ox._('{0} Century', Ox.formatOrdinal(i + 20))
-                    : Ox._('{0} Century BC', Ox.formatOrdinal(-i - 19))
+                    ? Ox._('{0} Century', [Ox.formatOrdinal(i + 20)])
+                    : Ox._('{0} Century BC', [Ox.formatOrdinal(-i - 19)])
             },
             value: function(date) {
                 return Math.floor(date.getUTCFullYear() / 100) - 19;