diff --git a/src/client/sandbox/cookie/index.ts b/src/client/sandbox/cookie/index.ts
index 0035ba480..fa4c98a19 100644
--- a/src/client/sandbox/cookie/index.ts
+++ b/src/client/sandbox/cookie/index.ts
@@ -135,14 +135,15 @@ class CookieSandboxProxyStrategy implements CookieSandboxStrategy {
             else if (parsedCookie.isWindowSync)
                 this.setCookie(parsedCookie);
             else if (parsedCookie.isClientSync) {
-                const currentDate = cookieUtils.getUTCDate();
+                const currentDate = new nativeMethods.date(); //eslint-disable-line new-cap
                 const maxAge      = Number(parsedCookie.maxAge);
                 const expires     = Number(parsedCookie.expires);
 
-                if (!isNaN(maxAge) && maxAge * 1000 < currentDate.getTime() - parsedCookie.lastAccessed.getTime() ||
+                if (!isNaN(maxAge) && maxAge * 1000 <= currentDate.getTime() - parsedCookie.lastAccessed.getTime() ||
                       !isNaN(expires) && expires < currentDate.getTime()) {
                     nativeMethods.documentCookieSetter.call(this.document, generateDeleteSyncCookieStr(parsedCookie));
                     CookieSandbox._updateClientCookieStr(parsedCookie.key, null);
+                    serverSyncCookies.push(parsedCookie);
                 }
             }
         }
diff --git a/src/utils/cookie.ts b/src/utils/cookie.ts
index ebf4ad422..6f37072b7 100644
--- a/src/utils/cookie.ts
+++ b/src/utils/cookie.ts
@@ -5,6 +5,7 @@
 
 import trim from './string-trim';
 import { CookieRecord, ParsedClientSyncCookie } from '../typings/cookie';
+import { isNil } from 'lodash';
 
 const TIME_RADIX                            = 36;
 const CLEAR_COOKIE_VALUE_STR                = '=;path=/;expires=Thu, 01 Jan 1970 00:00:01 GMT';
@@ -67,7 +68,7 @@ function formatSyncCookieKey (cookie: CookieRecord): string {
     const path         = encodeURIComponent(cookie.path);
     const expires      = cookie.expires !== 'Infinity' ? cookie.expires.getTime().toString(TIME_RADIX) : '';
     const lastAccessed = cookie.lastAccessed.getTime().toString(TIME_RADIX);
-    const maxAge       = cookie.maxAge && cookie.maxAge !== 'Infinity' ? cookie.maxAge.toString(TIME_RADIX) : '';
+    const maxAge       = !isNil(cookie.maxAge) && !isNaN(Number(cookie.maxAge)) && String(cookie.maxAge) !== 'Infinity' ? cookie.maxAge.toString(TIME_RADIX) : '';
 
     return `${syncType}|${cookie.sid}|${key}|${domain}|${path}|${expires}|${lastAccessed}|${maxAge}`;
 }
diff --git a/test/client/fixtures/sandbox/cookie-test.js b/test/client/fixtures/sandbox/cookie-test.js
index cb955cd08..63ff815d9 100644
--- a/test/client/fixtures/sandbox/cookie-test.js
+++ b/test/client/fixtures/sandbox/cookie-test.js
@@ -17,17 +17,21 @@ var validDateStr = validDate.toUTCString();
 // Need trying to turn on the disabled tests on the next Safari versions (15.3 and later)
 var isGreaterThanSafari15_1 = browserUtils.isSafari && parseFloat(browserUtils.fullVersion) >= '15.1'; //eslint-disable-line camelcase
 
-if (!isGreaterThanSafari15_1) { //eslint-disable-line camelcase
-    QUnit.testDone(function () {
-        nativeMethods.documentCookieGetter.call(document)
-            .split(';')
-            .forEach(function (cookie) {
-                var key = cookie.split('=')[0];
+function clearCookie () {
+    nativeMethods.documentCookieGetter.call(document)
+        .split(';')
+        .forEach(function (cookie) {
+            var key = cookie.split('=')[0];
 
-                nativeMethods.documentCookieSetter.call(document, key + '=;Path=/;expires=Thu, 01 Jan 1970 00:00:01 GMT');
-            });
+            nativeMethods.documentCookieSetter.call(document, key + '=;Path=/;expires=Thu, 01 Jan 1970 00:00:01 GMT');
+        });
 
-        settings.get().cookie = '';
+    settings.get().cookie = '';
+}
+
+if (!isGreaterThanSafari15_1) { //eslint-disable-line camelcase
+    QUnit.testDone(function () {
+        clearCookie();
     });
 
     test('get/set', function () {
@@ -101,7 +105,7 @@ if (!isGreaterThanSafari15_1) { //eslint-disable-line camelcase
             .then(function () {
                 return testCookies(storedForcedLocation, [
                     'Test1=Expired; expires=' + new Date((Math.floor(Date.now() / 1000) + 1) * 1000).toUTCString(),
-                    'Test2=Expired; max-age=' + 1,
+                    'Test2=Expired; max-age=' + 0,
                 ], '', 2000);
             })
             .then(function () {
@@ -204,7 +208,6 @@ if (!isGreaterThanSafari15_1) { //eslint-disable-line camelcase
 
         strictEqual(settings.get().cookie, 'temp=temp; test=123');
 
-        console.log(nativeMethods.documentCookieGetter.call(document));
         strictEqual(nativeMethods.documentCookieGetter.call(document).replace(/\|[^|]+\|=/, '|lastAccessed|='),
             'c|sessionId|temp|example.com|%2F||lastAccessed|=temp');
     });
@@ -270,6 +273,41 @@ if (!isGreaterThanSafari15_1) { //eslint-disable-line camelcase
             'c|sessionId|invalid|example.com|%2Fpath||lastAccessed|=path');
     });
 
+    test('cookie with the max-age', function () {
+        strictEqual(document.cookie, '');
+
+        document.cookie = 'temp=temp; max-age=9';
+
+        strictEqual(settings.get().cookie, 'temp=temp');
+        strictEqual(nativeMethods.documentCookieGetter.call(document).replace(/(\|[^|]+\|)(\d*=)/, '|lastAccessed|$2'),
+            'c|sessionId|temp|example.com|%2F||lastAccessed|9=temp');
+
+        clearCookie();
+
+        document.cookie = 'temp=temp; max-age=0';
+
+        strictEqual(settings.get().cookie, '');
+
+        strictEqual(nativeMethods.documentCookieGetter.call(document).replace(/(\|[^|]+\|)(\d*=)/, '|lastAccessed|$2'),
+            'c|sessionId|temp|example.com|%2F||lastAccessed|0=temp');
+
+        clearCookie();
+
+        document.cookie = 'temp=temp; max-age=Infinity';
+
+        strictEqual(settings.get().cookie, 'temp=temp');
+        strictEqual(nativeMethods.documentCookieGetter.call(document).replace(/(\|[^|]+\|)(=)/, '|lastAccessed|$2'),
+            'c|sessionId|temp|example.com|%2F||lastAccessed|=temp');
+
+        clearCookie();
+
+        document.cookie = 'temp=temp; max-age=-Infinity';
+
+        strictEqual(settings.get().cookie, '');
+        strictEqual(nativeMethods.documentCookieGetter.call(document).replace(/(\|[^|]+\|)(-Infinity=)/, '|lastAccessed|$2'),
+            'c|sessionId|temp|example.com|%2F||lastAccessed|-Infinity=temp');
+    });
+
     test('cookie with the invalid secure', function () {
         var storedForcedLocation = destLocation.getLocation();