Christmas snowflakes

app/helpers/application_helper.rb

@@ -1,5 +1,7 @@
 # frozen_string_literal: true
 
+require 'holiday_calendar'
+
 module ApplicationHelper
   # Example: charset: 'utf-8'
   def default_meta_tags

app/views/home/_xmas.erb

@@ -0,0 +1,6 @@
+<% if HolidayCalendar.new(Date.current).xmas? %>
+<script src="https://unpkg.com/magic-snowflakes/dist/snowflakes.min.js"></script>
+<script>
+  new Snowflakes();
+</script>
+<% end %>

app/views/home/index.slim

@@ -75,3 +75,4 @@
         = render 'contact_forms/contact'
       .col-md-8.col-sm-12
         = render 'contact_forms/form', contact_form: @home.contact
+= render 'xmas'

lib/holiday_calendar.rb

@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+require 'date'
+
+class HolidayCalendar
+  def initialize(date)
+    @date = date
+  end
+
+  def xmas?
+    (date.month == 12) && (24..26).cover?(date.day)
+  end
+
+  private
+
+  attr_reader :date
+end

spec/lib/holiday_calendar_spec.rb

@@ -0,0 +1,24 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+require 'holiday_calendar'
+
+RSpec.describe HolidayCalendar do
+  describe '#xmas?' do
+    context 'when date is before Christmas' do
+      it { expect(described_class.new(Date.new(2023, 12, 23))).not_to be_xmas }
+      it { expect(described_class.new(Date.new(2024, 1, 1))).not_to be_xmas }
+    end
+
+    context 'when the date is Christmas or Christmas Eve' do
+      it { expect(described_class.new(Date.new(2023, 12, 24))).to be_xmas }
+      it { expect(described_class.new(Date.new(2023, 12, 26))).to be_xmas }
+      it { expect(described_class.new(Date.new(2024, 12, 25))).to be_xmas }
+    end
+
+    context 'when date is after Christmas' do
+      it { expect(described_class.new(Date.new(2023, 12, 27))).not_to be_xmas }
+      it { expect(described_class.new(Date.new(2024, 12, 31))).not_to be_xmas }
+    end
+  end
+end