diff --git a/Gemfile b/Gemfile
index 3f8865eb0..9b98bfa23 100644
--- a/Gemfile
+++ b/Gemfile
@@ -36,5 +36,6 @@ group :test do
   gem "mocha", require: false
   gem "shoulda-context"
   gem "simplecov"
+  gem "timecop"
   gem "webmock"
 end
diff --git a/Gemfile.lock b/Gemfile.lock
index 107648a31..07669fff4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -570,6 +570,7 @@ GEM
     terser (1.2.3)
       execjs (>= 0.3.0, < 3)
     thor (1.3.1)
+    timecop (0.9.10)
     timeout (0.4.1)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
@@ -616,6 +617,7 @@ DEPENDENCIES
   simplecov
   sprockets-rails
   terser
+  timecop
   webmock
 
 RUBY VERSION
diff --git a/app/helpers/timed_update_helper.rb b/app/helpers/timed_update_helper.rb
new file mode 100644
index 000000000..3dbc6a37b
--- /dev/null
+++ b/app/helpers/timed_update_helper.rb
@@ -0,0 +1,5 @@
+module TimedUpdateHelper
+  def before_update_time?(year:, month:, day:, hour:, minute:)
+    Time.zone.now.before? Time.zone.local(year, month, day, hour, minute)
+  end
+end
diff --git a/app/views/components/_global_bar.html.erb b/app/views/components/_global_bar.html.erb
index 5ff9a8fd0..763419494 100644
--- a/app/views/components/_global_bar.html.erb
+++ b/app/views/components/_global_bar.html.erb
@@ -1,10 +1,10 @@
 <%
-  show_global_bar ||= true # Toggles the appearance of the global bar
-
-  title = "Bring photo ID to vote"
-  title_href = "/how-to-vote/photo-id-youll-need"
-  link_text = "Check what photo ID you'll need to vote in person in the General Election on 4 July."
-
+  if before_update_time?(year: 2024, month: 7, day: 4, hour: 22, minute: 0)
+    show_global_bar ||= true # Toggles the appearance of the global bar
+    title = "Bring photo ID to vote"
+    title_href = "/how-to-vote/photo-id-youll-need"
+    link_text = "Check what photo ID you'll need to vote in person in the General Election on 4 July."
+  end
 
   link_href = false
 
diff --git a/config/environments/test.rb b/config/environments/test.rb
index 2eecacae8..544904ae9 100644
--- a/config/environments/test.rb
+++ b/config/environments/test.rb
@@ -29,7 +29,7 @@
   config.cache_store = :null_store
 
   # Raise exceptions instead of rendering exception templates.
-  config.action_dispatch.show_exceptions = false
+  config.action_dispatch.show_exceptions = :none
 
   # Disable request forgery protection in test environment.
   config.action_controller.allow_forgery_protection = false
diff --git a/test/unit/helpers/timed_update_helper_test.rb b/test/unit/helpers/timed_update_helper_test.rb
new file mode 100644
index 000000000..3e971f8f3
--- /dev/null
+++ b/test/unit/helpers/timed_update_helper_test.rb
@@ -0,0 +1,20 @@
+require "test_helper"
+
+class TimedUpdateHelperTest < ActiveSupport::TestCase
+  include TimedUpdateHelper
+
+  test "#before_update_time? returns true if we haven't reached the requested time yet" do
+    Timecop.freeze(2024, 6, 17, 23, 59)
+    assert before_update_time?(year: 2024, month: 6, day: 18, hour: 0, minute: 0)
+  end
+
+  test "#before_update_time? returns false if we've reached the requested time" do
+    Timecop.freeze(2024, 6, 18, 0, 0)
+    assert_not before_update_time?(year: 2024, month: 6, day: 18, hour: 0, minute: 0)
+  end
+
+  test "#before_update_time? returns false if we've passed the requested time" do
+    Timecop.freeze(2024, 6, 20, 10, 10)
+    assert_not before_update_time?(year: 2024, month: 6, day: 18, hour: 0, minute: 0)
+  end
+end