diff --git a/src/gui/gcal-calendar-list.c b/src/gui/gcal-calendar-list.c
index 4886e74d..1cda3fc7 100644
--- a/src/gui/gcal-calendar-list.c
+++ b/src/gui/gcal-calendar-list.c
@@ -182,7 +182,7 @@ update_header_func (GtkListBoxRow *row,
         {
           header = g_object_new (GTK_TYPE_LABEL,
                                  "label", e_source_get_display_name (parent),
-                                 "css-classes", (const gchar * const []) { "header", NULL },
+                                 "css-classes", (const gchar * const []) { "heading", "dimmed", NULL },
                                  "xalign", 0.0,
                                  "margin-top", 18,
                                  "margin-bottom", 6,
@@ -195,7 +195,7 @@ update_header_func (GtkListBoxRow *row,
     {
       header = g_object_new (GTK_TYPE_LABEL,
                              "label", e_source_get_display_name (parent),
-                             "css-classes", (const gchar * const []) { "header", NULL },
+                             "css-classes", (const gchar * const []) { "heading", "dimmed", NULL },
                              "xalign", 0.0,
                              "margin-top", 18,
                              "margin-bottom", 6,
@@ -311,3 +311,4 @@ gcal_calendar_list_init (GcalCalendarList *self)
 {
   gtk_widget_init_template (GTK_WIDGET (self));
 }
+
diff --git a/src/gui/views/gcal-month-view.blp b/src/gui/views/gcal-month-view.blp
index 55033566..fa61b0d5 100644
--- a/src/gui/views/gcal-month-view.blp
+++ b/src/gui/views/gcal-month-view.blp
@@ -34,6 +34,8 @@ template $GcalMonthView: Widget {
   [header]
   Box {
     styles [
+      "header",
+      "heading",
       "month-header",
       "view",
     ]
@@ -44,70 +46,42 @@ template $GcalMonthView: Widget {
       margin-start: 6;
       hexpand: true;
       xalign: 0.0;
-
-      styles [
-        "header",
-      ]
     }
 
     Label label_1 {
       margin-start: 6;
       hexpand: true;
       xalign: 0.0;
-
-      styles [
-        "header",
-      ]
     }
 
     Label label_2 {
       margin-start: 6;
       hexpand: true;
       xalign: 0.0;
-
-      styles [
-        "header",
-      ]
     }
 
     Label label_3 {
       margin-start: 6;
       hexpand: true;
       xalign: 0.0;
-
-      styles [
-        "header",
-      ]
     }
 
     Label label_4 {
       margin-start: 6;
       hexpand: true;
       xalign: 0.0;
-
-      styles [
-        "header",
-      ]
     }
 
     Label label_5 {
       margin-start: 6;
       hexpand: true;
       xalign: 0.0;
-
-      styles [
-        "header",
-      ]
     }
 
     Label label_6 {
       margin-start: 6;
       hexpand: true;
       xalign: 0.0;
-
-      styles [
-        "header",
-      ]
     }
   }
 }
diff --git a/src/theme/style.css b/src/theme/style.css
index ae189b32..2a972fd2 100644
--- a/src/theme/style.css
+++ b/src/theme/style.css
@@ -15,10 +15,7 @@ calendar-view {
   font-size: 10pt;
 }
 
-calendar-view.header,
-label.header {
-  font-size: 10pt;
-  font-weight: bold;
+calendar-view box.header label {
   opacity: var(--dim-opacity);
 }