diff --git a/src/gcal-all-day-grid.c b/src/gcal-all-day-grid.c
index d3e4894e..6c82c21b 100644
--- a/src/gcal-all-day-grid.c
+++ b/src/gcal-all-day-grid.c
@@ -171,6 +171,10 @@ gcal_all_day_grid_init (GcalAllDayGrid *self)
   priv = gcal_all_day_grid_get_instance_private (self);
   priv->column_headers = NULL;
   priv->children = NULL;
+
+  gtk_style_context_add_class (
+      gtk_widget_get_style_context (GTK_WIDGET (self)),
+      "calendar-view");
 }
 
 static void
diff --git a/src/gcal-days-grid.c b/src/gcal-days-grid.c
index bb0da406..7feaa3f6 100644
--- a/src/gcal-days-grid.c
+++ b/src/gcal-days-grid.c
@@ -230,6 +230,9 @@ gcal_days_grid_init (GcalDaysGrid *self)
   priv->req_cell_height = 0;
 
   priv->children = NULL;
+  gtk_style_context_add_class (
+      gtk_widget_get_style_context (GTK_WIDGET (self)),
+      "calendar-view");
 }
 
 static void