diff --git a/src/constants.js b/src/constants.js
index 644516e..4ab6656 100644
--- a/src/constants.js
+++ b/src/constants.js
@@ -66,4 +66,3 @@ export const DEFAULT_PAGE_SIZE = 50;
 
 export const LOCAL_STORAGE_KEY = 'dictionary';
 export const SETTINGS_KEY = 'settings';
-export const DISMISSED_ANNOUNCEMENTS_KEY = 'dismissedAnnouncements';
diff --git a/src/js/announcements.js b/src/js/announcements.js
index 281ec50..70f8d3d 100644
--- a/src/js/announcements.js
+++ b/src/js/announcements.js
@@ -1,21 +1,20 @@
-import { DISMISSED_ANNOUNCEMENTS_KEY } from "../constants";
 import { fadeOutElement } from "./utilities";
+import { setCookie, getCookie } from "./StackOverflow/cookie";
 
-export function getDismissed() {
-  let dismissed = window.localStorage.getItem(DISMISSED_ANNOUNCEMENTS_KEY);
-  if (!dismissed) {
-    dismissed = [];
-  } else {
-    dismissed = JSON.parse(dismissed);
-  }
-  return dismissed;
+export function isDismissed(announcementId) {
+  let dismissed = getCookie(announcementId);
+  
+  return dismissed === 'dismissed';
 }
 
 export function dismiss(announcement) {
   if (announcement.id) {
-    const dismissed = getDismissed();
-    dismissed.push(announcement.id);
-    window.localStorage.setItem(DISMISSED_ANNOUNCEMENTS_KEY, JSON.stringify(dismissed));
+    const expireDate = announcement.dataset.expires;
+    const now = new Date();
+    const expire = new Date(expireDate);
+    const timeDiff = Math.abs(now.getTime() - expire.getTime());
+    const dayDifference = Math.ceil(timeDiff / (1000 * 3600 * 24));
+    setCookie(announcement.id, 'dismissed', dayDifference + 1);
   }
   fadeOutElement(announcement)
 }
diff --git a/src/js/setupListeners.js b/src/js/setupListeners.js
index 0bdc10f..6e0b548 100644
--- a/src/js/setupListeners.js
+++ b/src/js/setupListeners.js
@@ -11,7 +11,7 @@ import { showSearchModal, clearSearchText, checkAllPartsOfSpeechFilters, uncheck
 import helpFile from '../markdown/help.md';
 import termsFile from '../markdown/terms.md';
 import privacyFile from '../markdown/privacy.md';
-import { dismiss, getDismissed } from './announcements';
+import { dismiss, isDismissed } from './announcements';
 import { fadeOutElement } from './utilities';
 
 export default function setupListeners() {
@@ -39,9 +39,8 @@ export function setupHeaderButtons() {
 
 function setupAnnouncements() {
   const announcements = document.querySelectorAll('.announcement');
-  const dismissed = getDismissed();
   Array.from(announcements).forEach(announcement => {
-    if (announcement.id && dismissed.includes(announcement.id)) {
+    if (announcement.id && isDismissed(announcement.id)) {
       fadeOutElement(announcement);
     } else {
       announcement.querySelector('.close-button').addEventListener('click', () => dismiss(announcement));
diff --git a/src/php/router.php b/src/php/router.php
index ec73357..cd191e6 100644
--- a/src/php/router.php
+++ b/src/php/router.php
@@ -75,7 +75,7 @@ switch ($view) {
     foreach ($announcements as $announcement) {
       $expire = strtotime($announcement['expire']);
       if (time() < $expire) {
-        $announcements_html .= '<article class="announcement"' . (isset($announcement['dismissId']) ? ' id="announcement-' . $announcement['dismissId'] . '"' : '') . '>
+        $announcements_html .= '<article class="announcement"' . (isset($announcement['dismissId']) ? ' id="announcement-' . $announcement['dismissId'] . '"' : '') . ' data-expires="' . $announcement['expire'] . '">
         <a class="close-button" title="Dismiss Announcement">&times;&#xFE0E;</a>
         <h4>' . $announcement['header'] . '</h4>
         ' . $announcement['body'] . '