diff --git a/src/gui/event-editor/gcal-multi-choice.c b/src/gui/event-editor/gcal-multi-choice.c
index f13c8fec..9ab22637 100644
--- a/src/gui/event-editor/gcal-multi-choice.c
+++ b/src/gui/event-editor/gcal-multi-choice.c
@@ -52,6 +52,8 @@ struct _GcalMultiChoice
   GcalMultiChoiceFormatCallback   format_cb;
   gpointer                        format_data;
   GDestroyNotify                  format_destroy;
+  GcalMultiChoiceValueCallback    prev_cb;
+  GcalMultiChoiceValueCallback    next_cb;
 };
 
 enum
@@ -187,7 +189,9 @@ go_up (GcalMultiChoice *self)
   gboolean wrapped = FALSE;
   gint value;
 
-  value = self->value + 1;
+  value = self->next_cb ? self->next_cb (self->value) : self->value + 1;
+  g_assert_cmpint (value, > ,self->value);
+
   if (value > self->max_value)
     {
       if (!self->wrap)
@@ -209,7 +213,9 @@ go_down (GcalMultiChoice *self)
   gint value;
   gboolean wrapped = FALSE;
 
-  value = self->value - 1;
+  value = self->prev_cb ? self->prev_cb (self->value) : self->value - 1;
+  g_assert_cmpint (value, < , self->value);
+
   if (value < self->min_value)
     {
       if (!self->wrap)
@@ -849,6 +855,15 @@ gcal_multi_choice_set_format_callback (GcalMultiChoice               *self,
  *
  * Sets the popover for @self.
  */
+void
+gcal_multi_choice_set_value_callbacks (GcalMultiChoice              *self,
+                                       GcalMultiChoiceValueCallback  prev_cb,
+                                       GcalMultiChoiceValueCallback  next_cb)
+{
+  self->prev_cb = prev_cb;
+  self->next_cb = next_cb;
+}
+
 void
 gcal_multi_choice_set_popover (GcalMultiChoice *self,
                                GtkWidget       *popover)
diff --git a/src/gui/event-editor/gcal-multi-choice.h b/src/gui/event-editor/gcal-multi-choice.h
index 20bd6b48..e7959fb4 100644
--- a/src/gui/event-editor/gcal-multi-choice.h
+++ b/src/gui/event-editor/gcal-multi-choice.h
@@ -56,6 +56,12 @@ void                 gcal_multi_choice_set_format_callback       (GcalMultiChoic
                                                                   gpointer             user_data,
                                                                   GDestroyNotify       notify);
 
+typedef gint         (*GcalMultiChoiceValueCallback)             (gint                 value);
+
+void                 gcal_multi_choice_set_value_callbacks       (GcalMultiChoice     *self,
+                                                                  GcalMultiChoiceValueCallback  prev_cb,
+                                                                  GcalMultiChoiceValueCallback  next_cb);
+
 G_END_DECLS
 
 #endif /* GCAL_MULTI_CHOICE_H */