diff --git a/src/AbsoluteDateClock.php b/src/AbsoluteDateClock.php
index a129c15..089eb20 100644
--- a/src/AbsoluteDateClock.php
+++ b/src/AbsoluteDateClock.php
@@ -9,7 +9,7 @@
 
 class AbsoluteDateClock
 {
-    public static function now(\DateTimeZone $timeZone): AbsoluteDate
+    public static function now(\DateTimeZone $timeZone = null): AbsoluteDate
     {
         return self::relative('now', $timeZone);
     }
diff --git a/tests/AbsoluteDateClockTest.php b/tests/AbsoluteDateClockTest.php
index fea62f9..1162ff3 100644
--- a/tests/AbsoluteDateClockTest.php
+++ b/tests/AbsoluteDateClockTest.php
@@ -25,6 +25,14 @@ public function testNow(): void
         );
     }
 
+    public function testNowWithoutDateTimeZone(): void
+    {
+        self::assertEquals(
+            '2025-03-12',
+            AbsoluteDateClock::now()
+        );
+    }
+
     public function testRelative(): void
     {
         self::assertEquals(