diff --git a/tag_database b/tag_database
index 69e323572..2ee3c14f4 100644
--- a/tag_database
+++ b/tag_database
@@ -172,7 +172,7 @@ isTravisCI:node,intermediate
 isUndefined:type,beginner
 isUpperCase:string,utility,beginner
 isValidJSON:type,json,intermediate
-isWeekday:uncategorized
+isWeekday:date,beginner
 isWritableStream:node,type,intermediate
 join:array,intermediate
 JSONtoCSV:array,string,object,advanced