diff --git a/composer.json b/composer.json
index 6127ff32..a1f1574d 100644
--- a/composer.json
+++ b/composer.json
@@ -26,7 +26,8 @@
         "vimeo/psalm": "^5.23.1",
         "php-standard-library/psalm-plugin": "^2.3.0",
         "php-coveralls/php-coveralls": "^2.7.0",
-        "roave/infection-static-analysis-plugin": "^1.35.0"
+        "roave/infection-static-analysis-plugin": "^1.35.0",
+        "psr/clock": "^1.0"
     },
     "autoload": {
         "psr-4": {
diff --git a/composer.lock b/composer.lock
index a41893b1..1a92d65c 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "97465cc59bebf30479efdae3608e548a",
+    "content-hash": "bbc684c64ae904ca971de3fd202e2d65",
     "packages": [
         {
             "name": "revolt/event-loop",
@@ -3326,6 +3326,54 @@
             },
             "time": "2021-02-03T23:26:27+00:00"
         },
+        {
+            "name": "psr/clock",
+            "version": "1.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/php-fig/clock.git",
+                "reference": "e41a24703d4560fd0acb709162f73b8adfc3aa0d"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/php-fig/clock/zipball/e41a24703d4560fd0acb709162f73b8adfc3aa0d",
+                "reference": "e41a24703d4560fd0acb709162f73b8adfc3aa0d",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.0 || ^8.0"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Psr\\Clock\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "PHP-FIG",
+                    "homepage": "https://www.php-fig.org/"
+                }
+            ],
+            "description": "Common interface for reading the clock.",
+            "homepage": "https://github.com/php-fig/clock",
+            "keywords": [
+                "clock",
+                "now",
+                "psr",
+                "psr-20",
+                "time"
+            ],
+            "support": {
+                "issues": "https://github.com/php-fig/clock/issues",
+                "source": "https://github.com/php-fig/clock/tree/1.0.0"
+            },
+            "time": "2022-11-25T14:36:26+00:00"
+        },
         {
             "name": "psr/container",
             "version": "2.0.2",
diff --git a/src/Psl/Clock/ClockInterface.php b/src/Psl/Clock/ClockInterface.php
new file mode 100644
index 00000000..ecfd534f
--- /dev/null
+++ b/src/Psl/Clock/ClockInterface.php
@@ -0,0 +1,12 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Psl\Clock;
+
+use Psl\DateTime;
+
+interface ClockInterface
+{
+    public function now(): DateTime\DateTimeInterface;
+}
diff --git a/src/Psl/Clock/FrozenClock.php b/src/Psl/Clock/FrozenClock.php
new file mode 100644
index 00000000..644a3d5b
--- /dev/null
+++ b/src/Psl/Clock/FrozenClock.php
@@ -0,0 +1,24 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Psl\Clock;
+
+use Psl\DateTime;
+
+final class FrozenClock implements ClockInterface
+{
+    public function __construct(private DateTime\DateTime $dateTime)
+    {
+    }
+
+    public function synchronize(DateTime\DateTime $dateTime): void
+    {
+        $this->dateTime = $dateTime;
+    }
+
+    public function now(): DateTime\DateTimeInterface
+    {
+        return $this->dateTime;
+    }
+}
diff --git a/src/Psl/Clock/PsrClock.php b/src/Psl/Clock/PsrClock.php
new file mode 100644
index 00000000..48155e42
--- /dev/null
+++ b/src/Psl/Clock/PsrClock.php
@@ -0,0 +1,30 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Psl\Clock;
+
+use Psl\DateTime;
+use Psr\Clock\ClockInterface as PsrClockInterface;
+use function Psl\invariant;
+
+final class PsrClock implements ClockInterface
+{
+    public function __construct(private PsrClockInterface $psrClock)
+    {
+    }
+
+    public function now(): DateTime\DateTimeInterface
+    {
+        $nativeDateTime = $this->psrClock->now();
+
+        $timestamp = DateTime\Timestamp::fromParts($nativeDateTime->getTimestamp());
+
+        $timezone = $nativeDateTime->getTimezone();
+        invariant($timezone !== false, 'Could not get the timezone object.');
+
+        $timezone = DateTime\Timezone::from($timezone->getName());
+
+        return DateTime\DateTime::fromTimestamp($timestamp, $timezone);
+    }
+}
diff --git a/src/Psl/Clock/SystemClock.php b/src/Psl/Clock/SystemClock.php
new file mode 100644
index 00000000..a080325b
--- /dev/null
+++ b/src/Psl/Clock/SystemClock.php
@@ -0,0 +1,30 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Psl\Clock;
+
+use Psl\Clock\ClockInterface;
+use Psl\DateTime;
+
+final readonly class SystemClock implements ClockInterface
+{
+    private function __construct(private DateTime\Timezone $timezone)
+    {
+    }
+
+    public static function fromTimezone(DateTime\Timezone $timezone): self
+    {
+        return new self($timezone);
+    }
+
+    public static function fromSystemTimezone(): self
+    {
+        return new self(DateTime\Timezone::from(date_default_timezone_get()));
+    }
+
+    public function now(): DateTime\DateTimeInterface
+    {
+        return DateTime\DateTime::now($this->timezone);
+    }
+}
diff --git a/tests/unit/Clock/PsrClockTest.php b/tests/unit/Clock/PsrClockTest.php
new file mode 100644
index 00000000..f89992cd
--- /dev/null
+++ b/tests/unit/Clock/PsrClockTest.php
@@ -0,0 +1,44 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Psl\Tests\Unit\Clock;
+
+use Psl\Clock\PsrClock;
+use PHPUnit\Framework;
+use Psr\Clock\ClockInterface as PsrClockInterface;
+use Psl\DateTime;
+
+final class PsrClockTest extends Framework\TestCase
+{
+    public function testNow(): void
+    {
+        $clock = new PsrClock(
+            new FixedPsrClock(
+                new \DateTimeImmutable('2020-01-01 00:00:00', new \DateTimeZone('Africa/Tunis'))
+            )
+        );
+
+        self::assertTrue(
+            $clock->now()->equalsIncludingTimezone(
+                DateTime\DateTime::parse(
+                    '2020-01-01 00:00:00',
+                    DateTime\FormatPattern::SqlDateTime,
+                    DateTime\Timezone::AfricaTunis,
+                )
+            )
+        );
+    }
+}
+
+class FixedPsrClock implements PsrClockInterface
+{
+    public function __construct(private readonly \DateTimeImmutable $now)
+    {
+    }
+
+    public function now(): \DateTimeImmutable
+    {
+        return $this->now;
+    }
+}