CLDC-4173: date refactoring in tests

spec/models/form/sales/pages/building_height_class_spec.rb

@@ -5,7 +5,7 @@ RSpec.describe Form::Sales::Pages::BuildingHeightClass, type: :model do
 
   let(:page_id) { nil }
   let(:page_definition) { nil }
-  let(:subsection) { instance_double(Form::Subsection, form: instance_double(Form, start_date: Time.zone.local(2026, 4, 1))) }
+  let(:subsection) { instance_double(Form::Subsection, form: instance_double(Form, collection_start_date_for_year(2026))) }
   let(:sales_log) { FactoryBot.create(:sales_log, :completed) }
 
   it "has correct subsection" do

spec/models/form/sales/questions/building_height_class_spec.rb

@@ -5,7 +5,7 @@ RSpec.describe Form::Sales::Questions::BuildingHeightClass, type: :model do
 
   let(:question_id) { nil }
   let(:question_definition) { nil }
-  let(:page) { instance_double(Form::Page, subsection: instance_double(Form::Subsection, form: instance_double(Form, start_date: Time.zone.local(2026, 4, 1)))) }
+  let(:page) { instance_double(Form::Page, subsection: instance_double(Form::Subsection, form: instance_double(Form, collection_start_date_for_year(2026)))) }
 
   it "has correct page" do
     expect(question.page).to eq(page)