diff --git a/core/java/android/net/NetworkPolicyManager.java b/core/java/android/net/NetworkPolicyManager.java
index 11b861aef5aa3..22850b4bdb893 100644
--- a/core/java/android/net/NetworkPolicyManager.java
+++ b/core/java/android/net/NetworkPolicyManager.java
@@ -298,8 +298,11 @@ public class NetworkPolicyManager {
         cal.set(Calendar.MINUTE, 0);
         cal.set(Calendar.SECOND, 0);
         if (cycleDay > cal.getActualMaximum(Calendar.DAY_OF_MONTH)) {
-            cal.set(Calendar.DAY_OF_MONTH, 1);
             cal.add(Calendar.MONTH, 1);
+            cal.set(Calendar.DAY_OF_MONTH, 1);
+            cal.set(Calendar.HOUR_OF_DAY, 0);
+            cal.set(Calendar.MINUTE, 0);
+            cal.set(Calendar.SECOND, 0);
             cal.add(Calendar.SECOND, -1);
         } else {
             cal.set(Calendar.DAY_OF_MONTH, cycleDay);
diff --git a/services/tests/servicestests/src/com/android/server/NetworkPolicyManagerServiceTest.java b/services/tests/servicestests/src/com/android/server/NetworkPolicyManagerServiceTest.java
index ef95fb8f63540..a545af96da70f 100644
--- a/services/tests/servicestests/src/com/android/server/NetworkPolicyManagerServiceTest.java
+++ b/services/tests/servicestests/src/com/android/server/NetworkPolicyManagerServiceTest.java
@@ -446,6 +446,17 @@ public class NetworkPolicyManagerServiceTest {
         assertTimeEquals(expectedCycle, actualCycle);
     }
 
+    @Test
+    public void testLastCycleBoundaryJanuaryDST() throws Exception {
+        final long currentTime = parseTime("1989-01-26T21:00:00.000Z");
+        final long expectedCycle = parseTime("1989-01-01T01:59:59.000Z");
+
+        final NetworkPolicy policy = new NetworkPolicy(
+                sTemplateWifi, 32, "America/Argentina/Buenos_Aires", 1024L, 1024L, false);
+        final long actualCycle = computeLastCycleBoundary(currentTime, policy);
+        assertTimeEquals(expectedCycle, actualCycle);
+    }
+
     @Test
     public void testNetworkPolicyAppliedCycleLastMonth() throws Exception {
         NetworkState[] state = null;