diff --git a/src/Symfony/Component/Scheduler/Generator/MessageContext.php b/src/Symfony/Component/Scheduler/Generator/MessageContext.php
new file mode 100644
index 0000000000000..51caf94e9e042
--- /dev/null
+++ b/src/Symfony/Component/Scheduler/Generator/MessageContext.php
@@ -0,0 +1,29 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Scheduler\Generator;
+
+use Symfony\Component\Scheduler\Trigger\TriggerInterface;
+
+/**
+ * @author Tugdual Saunier <tugdual@saunier.tech>
+ *
+ * @experimental
+ */
+final class MessageContext
+{
+    public function __construct(
+        public readonly TriggerInterface $trigger,
+        public readonly \DateTimeImmutable $triggeredAt,
+        public readonly \DateTimeImmutable|null $nextTriggerAt = null,
+    ) {
+    }
+}
diff --git a/src/Symfony/Component/Scheduler/Generator/MessageGenerator.php b/src/Symfony/Component/Scheduler/Generator/MessageGenerator.php
index 2f9743c59bfc2..ffa5618332624 100644
--- a/src/Symfony/Component/Scheduler/Generator/MessageGenerator.php
+++ b/src/Symfony/Component/Scheduler/Generator/MessageGenerator.php
@@ -70,7 +70,7 @@ public function getMessages(): \Generator
             }
 
             if ($yield) {
-                yield $message;
+                yield (new MessageContext($trigger, $time, $nextTime)) => $message;
                 $this->checkpoint->save($time, $index);
             }
         }
diff --git a/src/Symfony/Component/Scheduler/Generator/MessageGeneratorInterface.php b/src/Symfony/Component/Scheduler/Generator/MessageGeneratorInterface.php
index 8b2f7eeacc4ce..64835e19d6138 100644
--- a/src/Symfony/Component/Scheduler/Generator/MessageGeneratorInterface.php
+++ b/src/Symfony/Component/Scheduler/Generator/MessageGeneratorInterface.php
@@ -17,7 +17,7 @@
 interface MessageGeneratorInterface
 {
     /**
-     * @return iterable<object>
+     * @return iterable<MessageContext, object>
      */
     public function getMessages(): iterable;
 }
diff --git a/src/Symfony/Component/Scheduler/Messenger/ScheduledStamp.php b/src/Symfony/Component/Scheduler/Messenger/ScheduledStamp.php
index 4b1b5cf1b577d..79efc1121e581 100644
--- a/src/Symfony/Component/Scheduler/Messenger/ScheduledStamp.php
+++ b/src/Symfony/Component/Scheduler/Messenger/ScheduledStamp.php
@@ -12,10 +12,14 @@
 namespace Symfony\Component\Scheduler\Messenger;
 
 use Symfony\Component\Messenger\Stamp\NonSendableStampInterface;
+use Symfony\Component\Scheduler\Generator\MessageContext;
 
 /**
  * @experimental
  */
 final class ScheduledStamp implements NonSendableStampInterface
 {
+    public function __construct(public readonly MessageContext $messageContext)
+    {
+    }
 }
diff --git a/src/Symfony/Component/Scheduler/Messenger/SchedulerTransport.php b/src/Symfony/Component/Scheduler/Messenger/SchedulerTransport.php
index 9625e8c41bba9..414945e617c83 100644
--- a/src/Symfony/Component/Scheduler/Messenger/SchedulerTransport.php
+++ b/src/Symfony/Component/Scheduler/Messenger/SchedulerTransport.php
@@ -28,8 +28,8 @@ public function __construct(
 
     public function get(): iterable
     {
-        foreach ($this->messageGenerator->getMessages() as $message) {
-            yield Envelope::wrap($message, [new ScheduledStamp()]);
+        foreach ($this->messageGenerator->getMessages() as $context => $message) {
+            yield Envelope::wrap($message, [new ScheduledStamp($context)]);
         }
     }
 
diff --git a/src/Symfony/Component/Scheduler/Tests/Generator/MessageGeneratorTest.php b/src/Symfony/Component/Scheduler/Tests/Generator/MessageGeneratorTest.php
index 8b6900b8bb037..1926bbb70fb7f 100644
--- a/src/Symfony/Component/Scheduler/Tests/Generator/MessageGeneratorTest.php
+++ b/src/Symfony/Component/Scheduler/Tests/Generator/MessageGeneratorTest.php
@@ -14,6 +14,7 @@
 use PHPUnit\Framework\TestCase;
 use Symfony\Component\Cache\Adapter\ArrayAdapter;
 use Symfony\Component\Clock\ClockInterface;
+use Symfony\Component\Scheduler\Generator\MessageContext;
 use Symfony\Component\Scheduler\Generator\MessageGenerator;
 use Symfony\Component\Scheduler\RecurringMessage;
 use Symfony\Component\Scheduler\Schedule;
@@ -43,14 +44,47 @@ public function testGetMessages(string $startTime, array $runs, array $schedule)
         $scheduler = new MessageGenerator($schedule, 'dummy', $clock);
 
         // Warmup. The first run is always returns nothing.
-        $this->assertSame([], iterator_to_array($scheduler->getMessages()));
+        $this->assertSame([], iterator_to_array($scheduler->getMessages(), false));
 
         foreach ($runs as $time => $expected) {
             $now = self::makeDateTime($time);
-            $this->assertSame($expected, iterator_to_array($scheduler->getMessages()));
+            $this->assertSame($expected, iterator_to_array($scheduler->getMessages(), false));
         }
     }
 
+    public function testYieldedContext()
+    {
+        // for referencing
+        $now = self::makeDateTime('22:12:00');
+
+        $clock = $this->createMock(ClockInterface::class);
+        $clock->method('now')->willReturnReference($now);
+
+        $message = $this->createMessage((object) ['id' => 'message'], '22:13:00', '22:14:00', '22:16:00');
+        $schedule = (new Schedule())->add($message);
+        $schedule->stateful(new ArrayAdapter());
+
+        $scheduler = new MessageGenerator($schedule, 'dummy', $clock);
+
+        // Warmup. The first run is alw ays returns nothing.
+        $this->assertSame([], iterator_to_array($scheduler->getMessages(), false));
+
+        $now = self::makeDateTime('22:14:10');
+
+        $iterator = $scheduler->getMessages();
+
+        $this->assertInstanceOf(MessageContext::class, $context = $iterator->key());
+        $this->assertSame($message->getTrigger(), $context->trigger);
+        $this->assertEquals(self::makeDateTime('22:13:00'), $context->triggeredAt);
+        $this->assertEquals(self::makeDateTime('22:14:00'), $context->nextTriggerAt);
+
+        $iterator->next();
+        $this->assertInstanceOf(MessageContext::class, $context = $iterator->key());
+        $this->assertSame($message->getTrigger(), $context->trigger);
+        $this->assertEquals(self::makeDateTime('22:14:00'), $context->triggeredAt);
+        $this->assertEquals(self::makeDateTime('22:16:00'), $context->nextTriggerAt);
+    }
+
     public static function messagesProvider(): \Generator
     {
         $first = (object) ['id' => 'first'];
diff --git a/src/Symfony/Component/Scheduler/Tests/Messenger/SchedulerTransportTest.php b/src/Symfony/Component/Scheduler/Tests/Messenger/SchedulerTransportTest.php
index 09f980c07ba2f..315048e9fbe0e 100644
--- a/src/Symfony/Component/Scheduler/Tests/Messenger/SchedulerTransportTest.php
+++ b/src/Symfony/Component/Scheduler/Tests/Messenger/SchedulerTransportTest.php
@@ -14,9 +14,11 @@
 use PHPUnit\Framework\TestCase;
 use Symfony\Component\Messenger\Envelope;
 use Symfony\Component\Scheduler\Exception\LogicException;
+use Symfony\Component\Scheduler\Generator\MessageContext;
 use Symfony\Component\Scheduler\Generator\MessageGeneratorInterface;
 use Symfony\Component\Scheduler\Messenger\ScheduledStamp;
 use Symfony\Component\Scheduler\Messenger\SchedulerTransport;
+use Symfony\Component\Scheduler\Trigger\TriggerInterface;
 
 class SchedulerTransportTest extends TestCase
 {
@@ -26,9 +28,15 @@ public function testGetFromIterator()
             (object) ['id' => 'first'],
             (object) ['id' => 'second'],
         ];
-        $generator = $this->createConfiguredMock(MessageGeneratorInterface::class, [
+        $generator = $this->createMock(MessageGeneratorInterface::class, [
             'getMessages' => $messages,
         ]);
+        $generator->method('getMessages')->willReturnCallback(function () use ($messages): \Generator {
+            $trigger = $this->createMock(TriggerInterface::class);
+            $triggerAt = new \DateTimeImmutable('2020-02-20T02:00:00', new \DateTimeZone('UTC'));
+            yield (new MessageContext($trigger, $triggerAt)) => $messages[0];
+            yield (new MessageContext($trigger, $triggerAt)) => $messages[1];
+        });
         $transport = new SchedulerTransport($generator);
 
         foreach ($transport->get() as $envelope) {