diff --git a/lib/Helper/Filter/JSON/TimestampFixFilter.php b/lib/Helper/Filter/JSON/TimestampFixFilter.php
new file mode 100644
index 00000000..4fcadb29
--- /dev/null
+++ b/lib/Helper/Filter/JSON/TimestampFixFilter.php
@@ -0,0 +1,32 @@
+<?php
+
+namespace OCA\Cookbook\Helper\Filter\JSON;
+
+/**
+ * Fix the timestamp of the dates created and modified for recipe stubs
+ *
+ * This mainly handles the missing `T` in the date between date and time to be ISO confirm.
+ */
+class TimestampFixFilter extends AbstractJSONFilter {
+	public function apply(array &$json): bool {
+		$changed = false;
+		foreach(['dateCreated', 'dateModified'] as $key) {
+			if($json[$key]) {
+				$json[$key] = $this->handleTimestamp($json[$key], $changed);
+			}
+		}
+		return $changed;
+	}
+
+	private function handleTimestamp(string $value, bool &$changed): string {
+		$pattern = '/^([0-9]{4}-[0-9]{2}-[0-9]{2}) +(.*)/';
+		$replacement = '${1}T${2}';
+		$nv = preg_replace($pattern, $replacement, $value);
+
+		if($nv !== $value) {
+			$changed = true;
+		}
+		return $nv;
+	}
+
+}
diff --git a/lib/Helper/Filter/Output/RecipeStubFilter.php b/lib/Helper/Filter/Output/RecipeStubFilter.php
index 8e38efcf..26a458f4 100644
--- a/lib/Helper/Filter/Output/RecipeStubFilter.php
+++ b/lib/Helper/Filter/Output/RecipeStubFilter.php
@@ -5,6 +5,7 @@ namespace OCA\Cookbook\Helper\Filter\Output;
 use OCA\Cookbook\Helper\Filter\JSON\AbstractJSONFilter;
 use OCA\Cookbook\Helper\Filter\JSON\RecipeIdCopyFilter;
 use OCA\Cookbook\Helper\Filter\JSON\RecipeIdTypeFilter;
+use OCA\Cookbook\Helper\Filter\JSON\TimestampFixFilter;
 
 class RecipeStubFilter {
 	/** @var AbstractJSONFilter[] */
@@ -12,11 +13,13 @@ class RecipeStubFilter {
 
 	public function __construct(
 		RecipeIdTypeFilter $recipeIdTypeFilter,
-		RecipeIdCopyFilter $recipeIdCopyFilter
+		RecipeIdCopyFilter $recipeIdCopyFilter,
+		TimestampFixFilter $timestampFixFilter
 	) {
 		$this->filters = [
 			$recipeIdCopyFilter,
 			$recipeIdTypeFilter,
+			$timestampFixFilter,
 		];
 	}
 
diff --git a/tests/Unit/Helper/Filter/JSON/TimestampFixFilterTest.php b/tests/Unit/Helper/Filter/JSON/TimestampFixFilterTest.php
new file mode 100644
index 00000000..52843e66
--- /dev/null
+++ b/tests/Unit/Helper/Filter/JSON/TimestampFixFilterTest.php
@@ -0,0 +1,42 @@
+<?php
+
+namespace OCA\Cookbook\tests\Unit\Helper\Filter\JSON;
+
+use OCA\Cookbook\Helper\Filter\JSON\TimestampFixFilter;
+use PHPUnit\Framework\TestCase;
+
+class TimestampFixFilterTest extends TestCase {
+	/** @var TimestampFixFilter */
+	private $dut;
+
+	protected function setUp(): void {
+		$this->dut = new TimestampFixFilter();
+	}
+
+	public function dp() {
+		yield ['2024-01-02T13:15:10', '2024-01-02T13:15:10', false];
+		yield ['2024-01-02 13:15:10', '2024-01-02T13:15:10', true];
+
+		yield ['2024-01-02T13:15:10+00:00', '2024-01-02T13:15:10+00:00', false];
+		yield ['2024-01-02 13:15:10+00:00', '2024-01-02T13:15:10+00:00', true];
+	}
+
+	private function getStub($time) {
+		return [
+			'dateCreated' => $time,
+			'dateModified' => $time,
+		];
+	}
+
+	/** @dataProvider dp */
+	public function testFilter($inputTime, $expectedOutputTime, $changed) {
+		$input = $this->getStub($inputTime);
+		$expectedOutput = $this->getStub($expectedOutputTime);
+
+		$ret = $this->dut->apply($input);
+		$this->assertEquals($changed, $ret);
+		$this->assertSame($expectedOutput, $input);
+	}
+
+	// }
+}