diff --git a/theme/zen/theme.json b/theme/zen/theme.json
index 98c0b700..078ec443 100644
--- a/theme/zen/theme.json
+++ b/theme/zen/theme.json
@@ -26,7 +26,6 @@
     "link-bg-color": "#5c4e41",
     "main-bg-color-reply": "#5c4e41",
     "main-bg-color-report": "#5c4e41",
-    "day-number2": "#5c4e41",
     "border-color": "#463b35",
     "border-width": "7px",
     "border-width-header": "7px",