From 1e9bcd7f1f8189653d4098e311f94a9e7ce316c6 Mon Sep 17 00:00:00 2001
From: Tomas Panek <34172483+tomaspanek@users.noreply.github.com>
Date: Sat, 5 Aug 2023 03:28:03 +0000
Subject: [PATCH 1/3] Timezone Offset Fix & Parsing with Leading Zeros

---
 src/lib/isDate.js | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/src/lib/isDate.js b/src/lib/isDate.js
index 9f1c6926b..862c3faa5 100644
--- a/src/lib/isDate.js
+++ b/src/lib/isDate.js
@@ -65,7 +65,19 @@ export default function isDate(input, options) {
       }
     }
 
-    return new Date(`${fullYear}-${dateObj.m}-${dateObj.d}`).getDate() === +dateObj.d;
+    let month = dateObj.m;
+
+    if (dateObj.m.length === 1) {
+      month = `0${dateObj.m}`;
+    }
+
+    let day = dateObj.d;
+
+    if (dateObj.d.length === 1) {
+      day = `0${dateObj.d}`;
+    }
+
+    return new Date(`${fullYear}-${month}-${day}T00:00:00`).getDate() === +dateObj.d;
   }
 
   if (!options.strictMode) {

From 6f91909ae060ea63c249489bef4626b237d84648 Mon Sep 17 00:00:00 2001
From: Tomas Panek <34172483+tomaspanek@users.noreply.github.com>
Date: Sat, 5 Aug 2023 13:31:21 +0000
Subject: [PATCH 2/3] `isDate` Timezone Mock Test, Support for NodeJS <8

---
 package.json            |  1 +
 src/lib/isDate.js       |  2 +-
 test/validators.test.js | 12 ++++++++++++
 3 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/package.json b/package.json
index 3f088d3ce..153e5c1a4 100644
--- a/package.json
+++ b/package.json
@@ -51,6 +51,7 @@
     "rimraf": "^3.0.0",
     "rollup": "^0.47.0",
     "rollup-plugin-babel": "^4.0.1",
+    "timezone-mock": "^1.3.6",
     "uglify-js": "^3.0.19"
   },
   "scripts": {
diff --git a/src/lib/isDate.js b/src/lib/isDate.js
index 862c3faa5..f0b28917a 100644
--- a/src/lib/isDate.js
+++ b/src/lib/isDate.js
@@ -77,7 +77,7 @@ export default function isDate(input, options) {
       day = `0${dateObj.d}`;
     }
 
-    return new Date(`${fullYear}-${month}-${day}T00:00:00`).getDate() === +dateObj.d;
+    return new Date(`${fullYear}-${month}-${day}T00:00:00.000Z`).getUTCDate() === +dateObj.d;
   }
 
   if (!options.strictMode) {
diff --git a/test/validators.test.js b/test/validators.test.js
index 6bf812d15..b17ad60e5 100644
--- a/test/validators.test.js
+++ b/test/validators.test.js
@@ -1,5 +1,6 @@
 import assert from 'assert';
 import fs from 'fs';
+import timezone_mock from 'timezone-mock';
 import { format } from 'util';
 import vm from 'vm';
 import validator from '../src/index';
@@ -13054,6 +13055,17 @@ describe('Validators', () => {
         '29.02.2020',
       ],
     });
+    // emulating Pacific time zone offset & time
+    // which could potentially result in UTC conversion issues
+    timezone_mock.register('US/Pacific');
+    test({
+      validator: 'isDate',
+      valid: [
+        new Date(),
+        '2023-08-04',
+      ],
+    });
+    timezone_mock.unregister();
   });
   it('should validate time', () => {
     test({

From 873ed37f1ed41d3dd8da1ec2098a24c38e11e23b Mon Sep 17 00:00:00 2001
From: Tomas Panek <34172483+tomaspanek@users.noreply.github.com>
Date: Sat, 5 Aug 2023 17:59:18 +0000
Subject: [PATCH 3/3] `isDate` Unit Test Resiliency Improvement

---
 test/validators.test.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/test/validators.test.js b/test/validators.test.js
index b17ad60e5..8fa0f04ae 100644
--- a/test/validators.test.js
+++ b/test/validators.test.js
@@ -13061,8 +13061,8 @@ describe('Validators', () => {
     test({
       validator: 'isDate',
       valid: [
-        new Date(),
-        '2023-08-04',
+        new Date(2016, 2, 29),
+        '2017-08-04',
       ],
     });
     timezone_mock.unregister();