diff --git a/.github/workflows/deploy-next-net.yml b/.github/workflows/deploy-next-net.yml
index b06d064986c9..619474782ff2 100644
--- a/.github/workflows/deploy-next-net.yml
+++ b/.github/workflows/deploy-next-net.yml
@@ -5,7 +5,9 @@ name: Deploy Next Net
 
 on:
   schedule:
-    # Run every morning at 6:00 AM UTC, after the nightly tag has been created
+    # Run every morning at 6:00 AM UTC, after the nightly tag has been created.
+    # If you change this time, also update the Grafana nightly_deployment mute
+    # window in spartan/metrics/grafana/alerts/mutetimes.yaml so alerts stay muted.
     - cron: "0 6 * * *"
   workflow_dispatch:
     inputs:
diff --git a/.github/workflows/deploy-staging-internal.yml b/.github/workflows/deploy-staging-internal.yml
index 9718194ce201..02b83d09ea6e 100644
--- a/.github/workflows/deploy-staging-internal.yml
+++ b/.github/workflows/deploy-staging-internal.yml
@@ -2,6 +2,9 @@ name: Deploy to staging internal
 
 on:
   schedule:
+    # Runs every morning at 6:00 AM UTC. If you change this time, also update the
+    # Grafana nightly_deployment mute window in
+    # spartan/metrics/grafana/alerts/mutetimes.yaml so alerts stay muted.
     - cron: "0 6 * * *"
   workflow_dispatch:
     inputs:
diff --git a/.github/workflows/deploy-staging-public.yml b/.github/workflows/deploy-staging-public.yml
index 8b5455cf142c..0e724a6c39ae 100644
--- a/.github/workflows/deploy-staging-public.yml
+++ b/.github/workflows/deploy-staging-public.yml
@@ -2,6 +2,9 @@ name: Deploy to staging public
 
 on:
   schedule:
+    # Runs every morning at 6:00 AM UTC. If you change this time, also update the
+    # Grafana nightly_deployment mute window in
+    # spartan/metrics/grafana/alerts/mutetimes.yaml so alerts stay muted.
     - cron: "0 6 * * *"
   workflow_dispatch:
     inputs:
diff --git a/spartan/metrics/grafana/alerts/mutetimes.yaml b/spartan/metrics/grafana/alerts/mutetimes.yaml
index 47a0aed15707..bfd0b66ff8ca 100644
--- a/spartan/metrics/grafana/alerts/mutetimes.yaml
+++ b/spartan/metrics/grafana/alerts/mutetimes.yaml
@@ -3,7 +3,12 @@ muteTimes:
     - orgId: 1
       name: nightly_deployment
       time_intervals:
+        # Covers the nightly deploy workflows, which run at 06:00 UTC
+        # (deploy-next-net / deploy-staging-* crons in .github/workflows).
+        # 2.5h window accounts for imprecise GitHub cron scheduling, the deploy
+        # itself, and the network taking ~3 epochs (~38 min each) to form a
+        # committee. If those deploy times change, update this window to match.
         - times:
-            - start_time: "04:00"
-              end_time: "05:00"
+            - start_time: "06:00"
+              end_time: "08:30"
           weekdays: [monday, tuesday, wednesday, thursday, friday, saturday, sunday]