diff --git a/automations.yaml b/automations.yaml
index e6a0fd7..1570fae 100644
--- a/automations.yaml
+++ b/automations.yaml
@@ -2,7 +2,7 @@
   alias: 'Tablet: Dim Screen at Night'
   description: Drops tablet brightness to zero at night
   triggers:
-  - at: 00:00:00
+  - at: '23:30:00'
     trigger: time
   actions:
   - action: notify.mobile_app_sm_t387w