diff --git a/src/TsidFactory.php b/src/TsidFactory.php
index 06f24f4..509ebc0 100644
--- a/src/TsidFactory.php
+++ b/src/TsidFactory.php
@@ -39,12 +39,12 @@ final class TsidFactory implements TsidFactoryInterface
 
     private int $customEpoch;
 
-    public function __construct(int $nodeBits = self::NODE_BITS_1024, int $node = null)
+    public function __construct(int $nodeBits = self::NODE_BITS_1024, ?int $node = null, ?DateTimeImmutable $customDateUtc = null)
     {
         $this->nodeBits = $nodeBits;
 
-        // Number of milliseconds of 2020-01-01T00:00:00.000Z.
-        $dateUtc = new DateTimeImmutable('2020-01-01T00:00:00.000Z', new DateTimeZone('UTC'));
+        // Number of milliseconds of 2020-01-01T00:00:00.000Z or custom date time.
+        $dateUtc = $customDateUtc ?: new DateTimeImmutable('2020-01-01T00:00:00.000Z', new DateTimeZone('UTC'));
         $this->customEpoch = (int)substr($dateUtc->format('Uu'), 0, 13);
 
         // setup constants that depend on node bits
diff --git a/tests/TsidFactoryTest.php b/tests/TsidFactoryTest.php
index 7c4339c..e729093 100644
--- a/tests/TsidFactoryTest.php
+++ b/tests/TsidFactoryTest.php
@@ -2,6 +2,8 @@
 
 namespace Odan\Tsid\Test;
 
+use DateTimeImmutable;
+use DateTimeZone;
 use Odan\Tsid\Tsid;
 use Odan\Tsid\TsidFactory;
 use PDO;
@@ -80,4 +82,24 @@ public function testSqlLite(): void
         ];
         $this->assertSame($expected, $user);
     }
+
+    public function testCustomDateUtc(): void
+    {
+        $customEpoch = new DateTimeImmutable('2026-01-01T00:00:00.000Z', new DateTimeZone('UTC'));
+
+        $factoryWithCustomEpoch = new TsidFactory(TsidFactory::NODE_BITS_1024, null, $customEpoch);
+        $factoryWithDefaultEpoch = new TsidFactory(TsidFactory::NODE_BITS_1024);
+
+        $tsidCustom = $factoryWithCustomEpoch->generate();
+        $tsidDefault = $factoryWithDefaultEpoch->generate();
+
+        // The custom epoch is later than the default epoch, so TSIDs generated
+        // with the custom epoch will have a smaller time component (fewer milliseconds since epoch).
+        // This means the custom epoch TSID should be smaller than the default epoch TSID.
+        $this->assertLessThan($tsidDefault->toInt(), $tsidCustom->toInt());
+
+        // Verify both TSIDs are valid 13-character strings
+        $this->assertSame(13, strlen($tsidCustom->toString()));
+        $this->assertSame(13, strlen($tsidDefault->toString()));
+    }
 }