diff --git a/app/javascript/src/javascripts/common.js b/app/javascript/src/javascripts/common.js
index 04e2af233..94b6bb8d0 100644
--- a/app/javascript/src/javascripts/common.js
+++ b/app/javascript/src/javascripts/common.js
@@ -7,6 +7,13 @@ $(function() {
     e.preventDefault();
   });
 
+  $("#hide-promotion-notice").on("click.danbooru", function(e) {
+    $("#promotion-notice").hide();
+    Cookie.put("hide_promotion_notice", "1", 1);
+    Cookie.put("hide_upgrade_account_notice", "1", 1);
+    e.preventDefault();
+  });
+
   $("#hide-dmail-notice").on("click.danbooru", function(e) {
     var $dmail_notice = $("#dmail-notice");
     $dmail_notice.hide();
diff --git a/app/models/user.rb b/app/models/user.rb
index 01730294c..732bf3079 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -404,7 +404,9 @@ class User < ApplicationRecord
     end
 
     def tag_query_limit
-      if is_platinum?
+      if is_member? && Danbooru.config.is_promotion?
+        1_000_000
+      elsif is_platinum?
         Danbooru.config.base_tag_query_limit * 2
       elsif is_gold?
         Danbooru.config.base_tag_query_limit
diff --git a/app/models/user_upgrade.rb b/app/models/user_upgrade.rb
index 55c388a46..7ccd87987 100644
--- a/app/models/user_upgrade.rb
+++ b/app/models/user_upgrade.rb
@@ -34,7 +34,11 @@ class UserUpgrade < ApplicationRecord
   end
 
   def self.gold_price
-    2000
+    if Danbooru.config.is_promotion?
+      1500
+    else
+      2000
+    end
   end
 
   def self.platinum_price
diff --git a/app/views/layouts/default.html.erb b/app/views/layouts/default.html.erb
index c79fa8acb..778a3c143 100644
--- a/app/views/layouts/default.html.erb
+++ b/app/views/layouts/default.html.erb
@@ -70,6 +70,25 @@
   <div id="page">
     <%= render "users/verification_notice" %>
 
+    <% if Danbooru.config.is_promotion? && cookies[:hide_promotion_notice].blank? %>
+      <div class="notice notice-info notice-large" id="promotion-notice">
+        <% if rand <= 0.0025 %>
+          <%= tag.img src: "/images/provgift.png", width: 24, height: 24 %>
+        <% elsif rand <= 0.0025 %>
+          <%= tag.img src: "/images/kemogift.png", width: 24, height: 24 %>
+        <% elsif rand <= 0.0025 %>
+          <%= tag.img src: "/images/padoru.gif", width: 24, height: 24 %>
+        <% elsif rand <= 0.0025 %>
+          <%= tag.img src: "/images/ablobgift.gif", width: 24, height: 24 %>
+        <% else %>
+          <%= tag.img src: "/images/blobgift.png", width: 24, height: 24 %>
+        <% end %>
+
+        <%= link_to "Danbooru Winter Sale!", forum_topic_path(17832) %> 25% off Gold and unlimited searches for Members!
+        (<%= link_to "hide", "#", id: "hide-promotion-notice" %>)
+      </div>
+    <% end %>
+
     <% if !CurrentUser.is_anonymous? && !CurrentUser.is_gold? && cookies[:hide_upgrade_account_notice].blank? && params[:action] != "upgrade_information" %>
       <%= render "users/upgrade_notice" %>
     <% end %>
diff --git a/app/views/user_upgrades/new.html.erb b/app/views/user_upgrades/new.html.erb
index b5d278fd9..6f125ebed 100644
--- a/app/views/user_upgrades/new.html.erb
+++ b/app/views/user_upgrades/new.html.erb
@@ -18,6 +18,10 @@
     <% else %>
       <h1>Upgrade Account</h1>
 
+      <% if Danbooru.config.is_promotion? %>
+        <p><b>Danbooru Winter Sale! Gold and Platinum upgrades are 25% off from now until January 1st.</b></p>
+      <% end %>
+
       <p>Upgrading your account gives you exclusive benefits and helps support
       <%= Danbooru.config.canonical_app_name %>. Your support helps keep the
       site ad-free for everyone!</p>
@@ -44,10 +48,16 @@
           <td></td>
           <td>Free</td>
           <td>
+            <% if Danbooru.config.is_promotion? %>
+              <s>$20</s>
+            <% end %>
             <%= cents_to_usd(UserUpgrade.gold_price) %>
             <div class="fineprint">One time fee</div>
           </td>
           <td>
+            <% if Danbooru.config.is_promotion? %>
+              <s>$40</s>
+            <% end %>
             <%= cents_to_usd(UserUpgrade.platinum_price) %>
             <div class="fineprint">One time fee</div>
           </td>
diff --git a/config/danbooru_default_config.rb b/config/danbooru_default_config.rb
index 75622de73..08f6c29ee 100644
--- a/config/danbooru_default_config.rb
+++ b/config/danbooru_default_config.rb
@@ -494,6 +494,12 @@ module Danbooru
     def redis_url
       "redis://localhost:6379"
     end
+
+    def is_promotion?
+      Time.use_zone("UTC") do
+        Time.zone.now < Time.zone.parse("2021-01-01")
+      end
+    end
   end
 
   EnvironmentConfiguration = Struct.new(:config) do
diff --git a/public/images/ablobgift.gif b/public/images/ablobgift.gif
new file mode 100644
index 000000000..bca83dc11
Binary files /dev/null and b/public/images/ablobgift.gif differ
diff --git a/public/images/blobgift.png b/public/images/blobgift.png
new file mode 100644
index 000000000..bfcb3aa64
Binary files /dev/null and b/public/images/blobgift.png differ
diff --git a/public/images/kemogift.png b/public/images/kemogift.png
new file mode 100644
index 000000000..300da66fb
Binary files /dev/null and b/public/images/kemogift.png differ
diff --git a/public/images/padoru.gif b/public/images/padoru.gif
new file mode 100644
index 000000000..454968b16
Binary files /dev/null and b/public/images/padoru.gif differ
diff --git a/public/images/provgift.png b/public/images/provgift.png
new file mode 100644
index 000000000..2dac5a97f
Binary files /dev/null and b/public/images/provgift.png differ