diff --git a/frontend/less/light/variables.less b/frontend/less/light/variables.less
index 5e016b8da1..e46f79a75e 100644
--- a/frontend/less/light/variables.less
+++ b/frontend/less/light/variables.less
@@ -57,5 +57,3 @@
 @panel-border-width-value: 1px;
 
 @default-box-shadow-value: 1px 1px 3px rgba(0,0,0,0.04);
-
-@calendar-busy-bg-value: #B7B1BBFF;