From 280ad6d428ecbc28f1f84c9c1dbbee78f95dfef2 Mon Sep 17 00:00:00 2001
From: kylekatarnls <kylekatarnls@gmail.com>
Date: Mon, 3 Jun 2024 15:42:02 +0200
Subject: [PATCH] Fix issue with is month check

Fix #3032
---
 src/Carbon/Traits/Comparison.php | 7 +++++++
 tests/Carbon/IsTest.php          | 3 +++
 2 files changed, 10 insertions(+)

diff --git a/src/Carbon/Traits/Comparison.php b/src/Carbon/Traits/Comparison.php
index de26ef56..3c28fdcb 100644
--- a/src/Carbon/Traits/Comparison.php
+++ b/src/Carbon/Traits/Comparison.php
@@ -881,6 +881,13 @@ public function is(string $tester): bool
             return $this->year === (int) $tester;
         }
 
+        if (preg_match('/^(?:Jan|January|Feb|February|Mar|March|Apr|April|May|Jun|June|Jul|July|Aug|August|Sep|September|Oct|October|Nov|November|Dec|December)$/i', $tester)) {
+            return $this->isSameMonth(
+                $this->transmitFactory(static fn () => static::parse($tester)),
+                false,
+            );
+        }
+
         if (preg_match('/^\d{3,}-\d{1,2}$/', $tester)) {
             return $this->isSameMonth(
                 $this->transmitFactory(static fn () => static::parse($tester)),
diff --git a/tests/Carbon/IsTest.php b/tests/Carbon/IsTest.php
index 85b31d75..e47a514d 100644
--- a/tests/Carbon/IsTest.php
+++ b/tests/Carbon/IsTest.php
@@ -1032,6 +1032,9 @@ public function testIs()
         $this->assertTrue(Carbon::parse('2019-06-02 12:23:45')->is('Sunday'));
         $this->assertFalse(Carbon::parse('2019-06-02 12:23:45')->is('Monday'));
         $this->assertTrue(Carbon::parse('2019-06-02 12:23:45')->is('June'));
+        $this->assertTrue(Carbon::parse('2019-05-31 12:23:45')->is('May'));
+        $this->assertTrue(Carbon::parse('2019-05-31 12:23:45')->is('mAy'));
+        $this->assertFalse(Carbon::parse('2019-05-31 12:23:45')->is('April'));
         $this->assertFalse(Carbon::parse('2019-06-02 12:23:45')->is('May'));
         $this->assertTrue(Carbon::parse('2019-06-02 12:23:45')->is('12:23'));
         $this->assertFalse(Carbon::parse('2019-06-02 12:23:45')->is('12:26'));