diff --git a/scripts/build_runtime_switch.py b/scripts/build_runtime_switch.py
index 996dace..f7fd56a 100644
--- a/scripts/build_runtime_switch.py
+++ b/scripts/build_runtime_switch.py
@@ -40,9 +40,9 @@
 }
 US_DCA_SCHEDULER = {
     "timezone": "America/New_York",
-    "main_time": "45 15 25-29 * *",
-    "probe_time": "35 9,15 25-29 * *",
-    "precheck_time": "45 9 25-29 * *",
+    "main_time": "45 15 25-28 * *",
+    "probe_time": "35 9,15 25-28 * *",
+    "precheck_time": "45 9 25-28 * *",
 }
 US_SNAPSHOT_SCHEDULER = {
     "timezone": "America/New_York",
diff --git a/tests/test_runtime_settings.py b/tests/test_runtime_settings.py
index 44b3a3a..198d7c8 100644
--- a/tests/test_runtime_settings.py
+++ b/tests/test_runtime_settings.py
@@ -375,9 +375,9 @@ def test_build_switch_target_uses_dca_monthly_scheduler_window(self):
             target["runtime_target"]["scheduler"],
             {
                 "timezone": "America/New_York",
-                "main_time": "45 15 25-29 * *",
-                "probe_time": "35 9,15 25-29 * *",
-                "precheck_time": "45 9 25-29 * *",
+                "main_time": "45 15 25-28 * *",
+                "probe_time": "35 9,15 25-28 * *",
+                "precheck_time": "45 9 25-28 * *",
             },
         )