diff --git a/.github/data/problems.json b/.github/data/problems.json
index 1174ac2c5..a867e1ce9 100644
--- a/.github/data/problems.json
+++ b/.github/data/problems.json
@@ -469,6 +469,10 @@
         {
             "day": "26",
             "title": "Add Digits"
+        },
+        {
+            "day": "27",
+            "title": "Bulb Switcher"
         }
     ]
 }
\ No newline at end of file
diff --git a/04- April/27- Bulb Switcher/.gitkeep b/04- April/27- Bulb Switcher/.gitkeep
new file mode 100644
index 000000000..e69de29bb