diff --git a/Themes/default/css/calendar.rtl.css b/Themes/default/css/calendar.rtl.css
index 692550c25a..5e8a207155 100644
--- a/Themes/default/css/calendar.rtl.css
+++ b/Themes/default/css/calendar.rtl.css
@@ -6,17 +6,3 @@
 #month_grid {
 	margin: 0 0 0 1%;
 }
-#main_grid table.weeklist td.windowbg {
-	border-left: 2px solid var(--calendar-weeklist-border-color);
-	border-bottom: 2px solid var(--calendar-weeklist-border-color);
-}
-#main_grid img.calendar_icon {
-	float: right;
-	margin: 0 0 0 4px;
-}
-#main_grid table.weeklist td.weekdays {
-	text-align: left;
-	vertical-align: middle;
-	border-right: 2px solid var(--calendar-weeklist-border-color);
-	border-bottom: 2px solid var(--calendar-weeklist-border-color);
-}
\ No newline at end of file
diff --git a/Themes/default/css/dark.css b/Themes/default/css/dark.css
index 9d1f4de88c..548f9dd884 100644
--- a/Themes/default/css/dark.css
+++ b/Themes/default/css/dark.css
@@ -567,7 +567,6 @@
 	--attachment-dropzone-border-color_hover:         hsl(var(--primary-color-hue), 45%, 55%);
 	--attachment-item-border-color:                   var(--dark-line);
 	--buttonrow-border-color:                         var(--dark-line);
-	--calendar-weeklist-border-color:                 var(--dark-bg-1);
 	--detailedinfo-border-color:                      var(--dark-line);
 	--draftoptions-border-color_left:                 var(--dark-line-strong);
 	--draftoptions-item-border-color:                 var(--dark-line);
diff --git a/Themes/default/css/variables.css b/Themes/default/css/variables.css
index 54178d739f..2880d7979b 100644
--- a/Themes/default/css/variables.css
+++ b/Themes/default/css/variables.css
@@ -799,7 +799,6 @@
 	--attachment-dropzone-border-color_hover:         #557ea0;
 	--attachment-item-border-color:                   #ddd;
 	--buttonrow-border-color:                         #ccc;
-	--calendar-weeklist-border-color:                 #fff;
 	--detailedinfo-border-color:                      #ccc;
 	--draftoptions-border-color_left:                 #bbb;
 	--draftoptions-item-border-color:                 #e4e4e4;