diff --git a/src/Runner.Common/Constants.cs b/src/Runner.Common/Constants.cs
index b9eeb6e81..42fb9dcbe 100644
--- a/src/Runner.Common/Constants.cs
+++ b/src/Runner.Common/Constants.cs
@@ -149,6 +149,7 @@ namespace GitHub.Runner.Common
             public static class Features
             {
                 public static readonly string DiskSpaceWarning = "runner.diskspace.warning";
+                public static readonly string Node12Warning = "DistributedTask.AddWarningToNode12Action";
             }
 
             public static readonly string InternalTelemetryIssueDataKey = "_internal_telemetry";
@@ -158,6 +159,7 @@ namespace GitHub.Runner.Common
             public static readonly string UnsupportedCommandMessageDisabled = "The `{0}` command is disabled. Please upgrade to using Environment Files or opt into unsecure command execution by setting the `ACTIONS_ALLOW_UNSECURE_COMMANDS` environment variable to `true`. For more information see: https://github.blog/changelog/2020-10-01-github-actions-deprecating-set-env-and-add-path-commands/";
             public static readonly string UnsupportedStopCommandTokenDisabled = "You cannot use a endToken that is an empty string, the string 'pause-logging', or another workflow command. For more information see: https://docs.github.com/actions/learn-github-actions/workflow-commands-for-github-actions#example-stopping-and-starting-workflow-commands or opt into insecure command execution by setting the `ACTIONS_ALLOW_UNSECURE_STOPCOMMAND_TOKENS` environment variable to `true`.";
             public static readonly string UnsupportedSummarySize = "$GITHUB_STEP_SUMMARY upload aborted, supports content up to a size of {0}k, got {1}k. For more information see: https://docs.github.com/actions/using-workflows/workflow-commands-for-github-actions#adding-a-markdown-summary";
+            public static readonly string Node12DetectedAfterEndOfLife = "Node.js 12 actions are deprecated. Please update the following actions to use Node.js 16: {0}";
         }
 
         public static class RunnerEvent
diff --git a/src/Runner.Worker/Handlers/NodeScriptActionHandler.cs b/src/Runner.Worker/Handlers/NodeScriptActionHandler.cs
index bd4cfc672..cc8cedfd0 100644
--- a/src/Runner.Worker/Handlers/NodeScriptActionHandler.cs
+++ b/src/Runner.Worker/Handlers/NodeScriptActionHandler.cs
@@ -3,6 +3,8 @@ using System.IO;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
+using GitHub.DistributedTask.Pipelines;
+using GitHub.DistributedTask.Pipelines.ContextData;
 using GitHub.DistributedTask.WebApi;
 using GitHub.Runner.Common;
 using GitHub.Runner.Sdk;
@@ -112,6 +114,17 @@ namespace GitHub.Runner.Worker.Handlers
             // Remove environment variable that may cause conflicts with the node within the runner.
             Environment.Remove("NODE_ICU_DATA"); // https://github.com/actions/runner/issues/795
 
+            if (Data.NodeVersion == "node12" && (ExecutionContext.Global.Variables.GetBoolean(Constants.Runner.Features.Node12Warning) ?? false))
+            {
+                if (!ExecutionContext.JobContext.ContainsKey("Node12ActionsWarnings"))
+                {                     
+                    ExecutionContext.JobContext["Node12ActionsWarnings"] = new ArrayContextData();
+                }
+                var repoAction = Action as RepositoryPathReference;
+                var actionDisplayName = new StringContextData(repoAction.Name ?? repoAction.Path); // local actions don't have a 'Name'                
+                ExecutionContext.JobContext["Node12ActionsWarnings"].AssertArray("Node12ActionsWarnings").Add(actionDisplayName);
+            }
+
             using (var stdoutManager = new OutputManager(ExecutionContext, ActionCommandManager))
             using (var stderrManager = new OutputManager(ExecutionContext, ActionCommandManager))
             {
diff --git a/src/Runner.Worker/JobRunner.cs b/src/Runner.Worker/JobRunner.cs
index 74b142885..ac2ebd42a 100644
--- a/src/Runner.Worker/JobRunner.cs
+++ b/src/Runner.Worker/JobRunner.cs
@@ -6,6 +6,7 @@ using System.Net.Http;
 using System.Text;
 using System.Threading;
 using System.Threading.Tasks;
+using GitHub.DistributedTask.Pipelines.ContextData;
 using GitHub.DistributedTask.WebApi;
 using GitHub.Runner.Common;
 using GitHub.Runner.Common.Util;
@@ -257,6 +258,12 @@ namespace GitHub.Runner.Worker
                 }
             }
 
+            if (jobContext.JobContext.ContainsKey("Node12ActionsWarnings"))
+            {
+                var actions = string.Join(", ", jobContext.JobContext["Node12ActionsWarnings"].AssertArray("Node12ActionsWarnings").Select(action => action.ToString()));
+                jobContext.Warning(string.Format(Constants.Runner.Node12DetectedAfterEndOfLife, actions));
+            }
+
             try
             {
                 await ShutdownQueue(throwOnFailure: true);
diff --git a/src/Runner.Worker/StepsRunner.cs b/src/Runner.Worker/StepsRunner.cs
index 82c9218ba..47f9d4c59 100644
--- a/src/Runner.Worker/StepsRunner.cs
+++ b/src/Runner.Worker/StepsRunner.cs
@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using System.Text;
 using System.Threading;
 using System.Threading.Tasks;