HOLD: Fix registration closed error caused by timezone mismatch in event form

app/views/events/_form.html.erb

@@ -76,6 +76,7 @@
                 } %>
       </div>
 
+      <%# Datetime values are already in the user's timezone via around_action :set_time_zone_from_user %>
       <div class="grid grid-cols-1 md:grid-cols-3 gap-4">
         <div>
           <%= f.label :start_date,

spec/views/events/_form_timezone_spec.rb

@@ -0,0 +1,69 @@
+require "rails_helper"
+
+RSpec.describe "events/_form timezone handling", type: :view do
+  let(:user) { create(:user, time_zone: "Pacific Time (US & Canada)") }
+  let(:location) { create(:location) }
+
+  before do
+    assign(:locations, [ location ])
+    assign(:sectors, [])
+    assign(:categories_grouped, [])
+    allow(view).to receive(:current_user).and_return(user)
+    allow(view).to receive(:allowed_to?).and_return(true)
+  end
+
+  context "when displaying datetime-local fields with user timezone" do
+    let(:event) do
+      # Use January dates to avoid DST ambiguity (PST = UTC-8)
+      create(:event,
+             start_date: Time.utc(2026, 1, 15, 20, 0),
+             end_date: Time.utc(2026, 1, 15, 22, 0),
+             registration_close_date: Time.utc(2026, 1, 14, 20, 0))
+    end
+
+    it "converts times to user's timezone via around_action :set_time_zone_from_user" do
+      assign(:event, event.decorate)
+
+      # Simulate the around_action :set_time_zone_from_user in ApplicationController
+      Time.use_zone(user.time_zone) do
+        render
+
+        # PST is UTC-8, so 20:00 UTC = 12:00 PST
+        expect(rendered).to have_selector(
+          "input[name='event[start_date]'][value='2026-01-15T12:00']"
+        )
+
+        expect(rendered).to have_selector(
+          "input[name='event[end_date]'][value='2026-01-15T14:00']"
+        )
+
+        expect(rendered).to have_selector(
+          "input[name='event[registration_close_date]'][value='2026-01-14T12:00']"
+        )
+      end
+    end
+  end
+
+  context "when event has nil registration_close_date" do
+    let(:event) do
+      create(:event,
+             start_date: 2.days.from_now,
+             end_date: 3.days.from_now,
+             registration_close_date: nil)
+    end
+
+    it "handles nil registration_close_date gracefully" do
+      assign(:event, event.decorate)
+
+      Time.use_zone(user.time_zone) do
+        render
+
+        expect(rendered).to have_selector("input[name='event[start_date]']")
+        expect(rendered).to have_selector("input[name='event[end_date]']")
+        expect(rendered).to have_selector("input[name='event[registration_close_date]']")
+
+        expect(rendered).to have_selector("input[name='event[registration_close_date]'][value='']")
+      end
+    end
+  end
+end