diff --git a/src/Carbon/Traits/Creator.php b/src/Carbon/Traits/Creator.php
index 2ea258158b..0d611ea22e 100644
--- a/src/Carbon/Traits/Creator.php
+++ b/src/Carbon/Traits/Creator.php
@@ -663,12 +663,14 @@ public static function rawCreateFromFormat($format, $time, $tz = null)
                 $tz = clone $mock->getTimezone();
             }
 
-            // Set microseconds to zero to match behavior of DateTime::createFromFormat()
-            // See https://bugs.php.net/bug.php?id=74332
-            $mock = $mock->copy()->microsecond(0);
+            $mock = $mock->copy();
 
             // Prepend mock datetime only if the format does not contain non escaped unix epoch reset flag.
             if (!preg_match("/{$nonEscaped}[!|]/", $format)) {
+                if (preg_match('/[HhGgisvuB]/', $format)) {
+                    $mock = $mock->setTime(0, 0);
+                }
+
                 $format = static::MOCK_DATETIME_FORMAT.' '.$format;
                 $time = ($mock instanceof self ? $mock->rawFormat(static::MOCK_DATETIME_FORMAT) : $mock->format(static::MOCK_DATETIME_FORMAT)).' '.$time;
             }
diff --git a/tests/Carbon/TestingAidsTest.php b/tests/Carbon/TestingAidsTest.php
index b90f66eb0f..c7c9906060 100644
--- a/tests/Carbon/TestingAidsTest.php
+++ b/tests/Carbon/TestingAidsTest.php
@@ -245,8 +245,8 @@ public function testCreateFromPartialFormat()
         $this->assertSame('2013-09-01T10:20:30-07:00', Carbon::createFromFormat('H:i:s', '10:20:30')->toIso8601String());
 
         // Custom timezone.
-        $this->assertSame('2013-09-01T10:20:15+03:00', Carbon::createFromFormat('H:i e', '10:20 Europe/Kiev')->toIso8601String());
-        $this->assertSame('2013-09-01T10:20:15+01:00', Carbon::createFromFormat('H:i', '10:20', 'Europe/London')->toIso8601String());
+        $this->assertSame('2013-09-01T10:20:00+03:00', Carbon::createFromFormat('H:i e', '10:20 Europe/Kiev')->toIso8601String());
+        $this->assertSame('2013-09-01T10:20:00+01:00', Carbon::createFromFormat('H:i', '10:20', 'Europe/London')->toIso8601String());
         $this->assertSame('2013-09-01T11:30:00+07:00', Carbon::createFromFormat('H:i:s e', '11:30:00+07:00')->toIso8601String());
         $this->assertSame('2013-09-01T11:30:00+05:00', Carbon::createFromFormat('H:i:s', '11:30:00', '+05:00')->toIso8601String());
 
@@ -255,7 +255,7 @@ public function testCreateFromPartialFormat()
 
         // Weird format, naive modify would fail here.
         $this->assertSame('2005-08-09T05:10:15-07:00', Carbon::createFromFormat('l jS \of F Y', 'Tuesday 9th of August 2005')->toIso8601String());
-        $this->assertSame('2013-09-01T05:12:13-07:00', Carbon::createFromFormat('i:s', '12:13')->toIso8601String());
+        $this->assertSame('2013-09-01T00:12:13-07:00', Carbon::createFromFormat('i:s', '12:13')->toIso8601String());
         $this->assertSame('2018-09-05T05:10:15-07:00', Carbon::createFromFormat('Y/d', '2018/5')->toIso8601String());
 
         // Resetting to epoch.
@@ -283,9 +283,7 @@ public function testCreateFromPartialFormatWithMicroseconds()
     {
         Carbon::setTestNowAndTimezone(Carbon::parse('2013-09-01 05:10:15.123456', 'America/Vancouver'));
 
-        // Set microseconds to zero to match behavior of DateTime::createFromFormat()
-        // See https://bugs.php.net/bug.php?id=74332
-        $this->assertSame('2018-05-06 05:10:15.000000', Carbon::createFromFormat('Y-m-d', '2018-05-06')->format('Y-m-d H:i:s.u'));
+        $this->assertSame('2018-05-06 05:10:15.123456', Carbon::createFromFormat('Y-m-d', '2018-05-06')->format('Y-m-d H:i:s.u'));
         $this->assertSame('2013-09-01 10:20:30.654321', Carbon::createFromFormat('H:i:s.u', '10:20:30.654321')->format('Y-m-d H:i:s.u'));
     }
 
@@ -293,7 +291,7 @@ public function testCreateFromDateTimeInterface()
     {
         Carbon::setTestNowAndTimezone(date_create('2013-09-01 05:10:15.123456', new DateTimeZone('America/Vancouver')));
 
-        $this->assertSame('2018-05-06 05:10:15.000000', Carbon::createFromFormat('Y-m-d', '2018-05-06')->format('Y-m-d H:i:s.u'));
+        $this->assertSame('2018-05-06 05:10:15.123456', Carbon::createFromFormat('Y-m-d', '2018-05-06')->format('Y-m-d H:i:s.u'));
         $this->assertSame('2013-09-01 10:20:30.654321', Carbon::createFromFormat('H:i:s.u', '10:20:30.654321')->format('Y-m-d H:i:s.u'));
     }
 
diff --git a/tests/CarbonImmutable/TestingAidsTest.php b/tests/CarbonImmutable/TestingAidsTest.php
index d0c0ce53ed..0a52f9459c 100644
--- a/tests/CarbonImmutable/TestingAidsTest.php
+++ b/tests/CarbonImmutable/TestingAidsTest.php
@@ -219,8 +219,8 @@ public function testCreateFromPartialFormat()
         $this->assertSame('2013-09-01T10:20:30-07:00', Carbon::createFromFormat('H:i:s', '10:20:30')->toIso8601String());
 
         // Custom timezone.
-        $this->assertSame('2013-09-01T10:20:15+03:00', Carbon::createFromFormat('H:i e', '10:20 Europe/Kiev')->toIso8601String());
-        $this->assertSame('2013-09-01T10:20:15+01:00', Carbon::createFromFormat('H:i', '10:20', 'Europe/London')->toIso8601String());
+        $this->assertSame('2013-09-01T10:20:00+03:00', Carbon::createFromFormat('H:i e', '10:20 Europe/Kiev')->toIso8601String());
+        $this->assertSame('2013-09-01T10:20:00+01:00', Carbon::createFromFormat('H:i', '10:20', 'Europe/London')->toIso8601String());
         $this->assertSame('2013-09-01T11:30:00+07:00', Carbon::createFromFormat('H:i:s e', '11:30:00+07:00')->toIso8601String());
         $this->assertSame('2013-09-01T11:30:00+05:00', Carbon::createFromFormat('H:i:s', '11:30:00', '+05:00')->toIso8601String());
 
@@ -229,7 +229,7 @@ public function testCreateFromPartialFormat()
 
         // Weird format, naive modify would fail here.
         $this->assertSame('2005-08-09T05:10:15-07:00', Carbon::createFromFormat('l jS \of F Y', 'Tuesday 9th of August 2005')->toIso8601String());
-        $this->assertSame('2013-09-01T05:12:13-07:00', Carbon::createFromFormat('i:s', '12:13')->toIso8601String());
+        $this->assertSame('2013-09-01T00:12:13-07:00', Carbon::createFromFormat('i:s', '12:13')->toIso8601String());
         $this->assertSame('2018-09-05T05:10:15-07:00', Carbon::createFromFormat('Y/d', '2018/5')->toIso8601String());
 
         // Resetting to epoch.
@@ -251,15 +251,16 @@ public function testCreateFromPartialFormat()
         $this->assertSame('2013-09-01T05:10:15-07:00', Carbon::createFromFormat('\|', '|')->toIso8601String());
         $this->assertSame('2013-09-01T05:10:15-07:00', Carbon::createFromFormat('\!', '!')->toIso8601String());
         $this->assertSame('2013-09-01T05:10:15+03:00', Carbon::createFromFormat('e \!', 'Europe/Kiev !')->toIso8601String());
+
+        Carbon::setTestNow('2023-12-05 21:09:54');
+        $this->assertSame('2023-12-05 15:00:00.000000', Carbon::createFromFormat('H', '15')->format('Y-m-d H:i:s.u'));
     }
 
     public function testCreateFromPartialFormatWithMicroseconds()
     {
         Carbon::setTestNowAndTimezone(Carbon::parse('2013-09-01 05:10:15.123456', 'America/Vancouver'));
 
-        // Set microseconds to zero to match behavior of DateTime::createFromFormat()
-        // See https://bugs.php.net/bug.php?id=74332
-        $this->assertSame('2018-05-06 05:10:15.000000', Carbon::createFromFormat('Y-m-d', '2018-05-06')->format('Y-m-d H:i:s.u'));
+        $this->assertSame('2018-05-06 05:10:15.123456', Carbon::createFromFormat('Y-m-d', '2018-05-06')->format('Y-m-d H:i:s.u'));
         $this->assertSame('2013-09-01 10:20:30.654321', Carbon::createFromFormat('H:i:s.u', '10:20:30.654321')->format('Y-m-d H:i:s.u'));
     }
 
@@ -267,7 +268,7 @@ public function testCreateFromDateTimeInterface()
     {
         Carbon::setTestNowAndTimezone(date_create_immutable('2013-09-01 05:10:15.123456', new DateTimeZone('America/Vancouver')));
 
-        $this->assertSame('2018-05-06 05:10:15.000000', Carbon::createFromFormat('Y-m-d', '2018-05-06')->format('Y-m-d H:i:s.u'));
+        $this->assertSame('2018-05-06 05:10:15.123456', Carbon::createFromFormat('Y-m-d', '2018-05-06')->format('Y-m-d H:i:s.u'));
         $this->assertSame('2013-09-01 10:20:30.654321', Carbon::createFromFormat('H:i:s.u', '10:20:30.654321')->format('Y-m-d H:i:s.u'));
     }