diff --git a/app/javascript/src/javascripts/common.js b/app/javascript/src/javascripts/common.js
index c03552164..996b8fce2 100644
--- a/app/javascript/src/javascripts/common.js
+++ b/app/javascript/src/javascripts/common.js
@@ -8,6 +8,13 @@ $(function() {
     e.preventDefault();
   });
 
+  $("#hide-promotion-notice").on("click.danbooru", function(e) {
+    $("#promotion-notice").hide();
+    Cookie.put('hide_promotion_notice', '1', 7);
+    Cookie.put('hide_upgrade_account_notice', '1', 7);
+    e.preventDefault();
+  });
+
   $("#hide-dmail-notice").on("click.danbooru", function(e) {
     var $dmail_notice = $("#dmail-notice");
     $dmail_notice.hide();
diff --git a/app/logical/user_upgrade.rb b/app/logical/user_upgrade.rb
index b29909faf..eb4e18e0c 100644
--- a/app/logical/user_upgrade.rb
+++ b/app/logical/user_upgrade.rb
@@ -1,13 +1,25 @@
 class UserUpgrade
   def self.gold_price
-    2000
+    if Danbooru.config.is_promotion?
+      1500
+    else
+      2000
+    end
   end
 
   def self.platinum_price
-    4000
+    if Danbooru.config.is_promotion?
+      3000
+    else
+      4000
+    end
   end
 
   def self.upgrade_price
-    2000
+    if Danbooru.config.is_promotion?
+      1500
+    else
+      2000
+    end
   end
 end
diff --git a/app/models/user.rb b/app/models/user.rb
index db59924e5..4e0fbabdc 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -505,6 +505,8 @@ class User < ApplicationRecord
         Danbooru.config.base_tag_query_limit * 2
       elsif is_gold?
         Danbooru.config.base_tag_query_limit
+      elsif is_member? && Danbooru.config.is_promotion?
+        Danbooru.config.base_tag_query_limit
       else
         2
       end
diff --git a/app/views/layouts/default.html.erb b/app/views/layouts/default.html.erb
index 409dc93ba..3887caaf1 100644
--- a/app/views/layouts/default.html.erb
+++ b/app/views/layouts/default.html.erb
@@ -97,7 +97,15 @@
   </header>
 
   <div id="page">
-    <% if !CurrentUser.is_anonymous? && !CurrentUser.is_gold? && cookies[:hide_upgrade_account_notice].blank? && params[:action] != "upgrade_information" %>
+    <% if Danbooru.config.is_promotion? && cookies[:hide_promotion_notice].blank? %>
+      <div class="notice notice-info notice-large" id="promotion-notice">
+        Danbooru Winter Sale! 25% off Gold and free 6-tag searches for Members!
+
+        (<%= link_to "close", "#", id: "hide-promotion-notice" %>)
+      </div>
+    <% end %>
+
+    <% if !Danbooru.config.is_promotion? && !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 2102cffca..76bf124cc 100644
--- a/app/views/user_upgrades/new.html.erb
+++ b/app/views/user_upgrades/new.html.erb
@@ -3,7 +3,17 @@
     <h1>Upgrade Account</h1>
 
     <% unless params[:user_id] %>
-      <p class="copy">Want more searching power? Upgrade your account and become a power user of the best database of anime artwork on the internet.</p>
+      <p class="copy">
+        Want more searching power? Upgrade your account and
+        become a power user of the best database of anime artwork on the
+        internet.
+      </p>
+
+      <% if Danbooru.config.is_promotion? %>
+        <p>
+          <h6>Danbooru Winter Sale! Gold and Platinum upgrades are 25% off from now until December 28th.</h6>
+        </p>
+      <% end %>
 
       <div id="feature-comparison">
         <table>
@@ -24,10 +34,16 @@
               <td>Cost</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 90a67efe5..e4f99361c 100644
--- a/config/danbooru_default_config.rb
+++ b/config/danbooru_default_config.rb
@@ -638,6 +638,12 @@ module Danbooru
     def redis_url
       "redis://localhost:6379"
     end
+
+    def is_promotion?
+      Time.use_zone("UTC") do
+        Time.zone.now.in?(Time.zone.parse("2019-12-25")..Time.zone.parse("2019-12-28"))
+      end
+    end
   end
 
   class EnvironmentConfiguration