diff --git a/src/lib/elementary/efl_ui_timepicker.c b/src/lib/elementary/efl_ui_timepicker.c
--- a/src/lib/elementary/efl_ui_timepicker.c
+++ b/src/lib/elementary/efl_ui_timepicker.c
@@ -245,7 +245,7 @@
 }
 
 EOLIAN static void
-_efl_ui_timepicker_ampm_set(Eo *obj, Efl_Ui_Timepicker_Data *pd, Eina_Bool is_24hour)
+_efl_ui_timepicker_is_24hour_set(Eo *obj, Efl_Ui_Timepicker_Data *pd, Eina_Bool is_24hour)
 {
    if (pd->is_24hour == is_24hour) return;
 
@@ -258,7 +258,7 @@
 }
 
 EOLIAN static Eina_Bool
-_efl_ui_timepicker_ampm_get(const Eo *obj EINA_UNUSED, Efl_Ui_Timepicker_Data *pd)
+_efl_ui_timepicker_is_24hour_get(const Eo *obj EINA_UNUSED, Efl_Ui_Timepicker_Data *pd)
 {
    return pd->is_24hour;
 }
diff --git a/src/lib/elementary/efl_ui_timepicker.eo b/src/lib/elementary/efl_ui_timepicker.eo
--- a/src/lib/elementary/efl_ui_timepicker.eo
+++ b/src/lib/elementary/efl_ui_timepicker.eo
@@ -23,7 +23,7 @@
             min: int; [[The minute value from 0 to 59.]]
          }
       }
-      @property ampm {
+      @property is_24hour {
          [[Control if the Timepicker displays 24 hour time or 12 hour time including AM/PM button.]]
          set {
          }