diff --git a/mmv1/third_party/terraform/.teamcity/components/builds/build_triggers.kt b/mmv1/third_party/terraform/.teamcity/components/builds/build_triggers.kt
index 9875a8f19b49..f56235a9f0a5 100644
--- a/mmv1/third_party/terraform/.teamcity/components/builds/build_triggers.kt
+++ b/mmv1/third_party/terraform/.teamcity/components/builds/build_triggers.kt
@@ -20,8 +20,7 @@ fun Triggers.runNightly(config: NightlyTriggerConfiguration) {
     val filter = "+:refs/heads/main"
 
     schedule{
-        // enabled = config.nightlyTestsEnabled
-        enabled = false // Temporary measure while developing new config
+        enabled = config.nightlyTestsEnabled
         branchFilter = filter
         triggerBuild = always() // Run build even if no new commits/pending changes
         withPendingChangesOnly = false
diff --git a/mmv1/third_party/terraform/.teamcity/components/constants.kt b/mmv1/third_party/terraform/.teamcity/components/constants.kt
index 1bf0b0653a7c..fbf3ded5d3f9 100644
--- a/mmv1/third_party/terraform/.teamcity/components/constants.kt
+++ b/mmv1/third_party/terraform/.teamcity/components/constants.kt
@@ -5,7 +5,7 @@ const val ProviderNameGa = "google"
 const val ProviderNameBeta = "google-beta"
 
 // specifies the default hour (UTC) at which tests should be triggered, if enabled
-const val DefaultStartHour = 17
+const val DefaultStartHour = 4
 
 // specifies the default level of parallelism per-service-package
 const val DefaultParallelism = 6