diff --git a/apps/client/src/stylesheets/theme-next/shell.css b/apps/client/src/stylesheets/theme-next/shell.css
index 0ffe0ec40..9dbb04c9f 100644
--- a/apps/client/src/stylesheets/theme-next/shell.css
+++ b/apps/client/src/stylesheets/theme-next/shell.css
@@ -348,6 +348,21 @@ body.layout-horizontal > .horizontal {
     --select-arrow-svg: initial; /* Disable the dropdown arrow */
 }
 
+/* Week number column */
+.calendar-dropdown-widget .calendar-week-number {
+    transform: rotate(270deg);
+    justify-content: center;
+    padding: 0;
+    opacity: 0.5;
+    font-size: 1em;
+    font-weight: 700;
+    letter-spacing: .5pt;
+}
+
+.calendar-dropdown-widget .calendar-week-number::after {
+    display: none;
+}
+
 @media (max-width: 992px) {
     .calendar-dropdown-widget .calendar-header button {
         margin: 0 !important;