Render yearly view

app/views/home/index.erb

@@ -4,6 +4,11 @@ first_days = (1..12).map do |index|
 end
 %>
 
+<div class="w-1/3 mx-auto flex justify-between pb-4">
+	<%= link_to (@year-1), root_path(year: @year-1) %>
+	<%= @year %>
+	<%= link_to (@year+1), root_path(year: @year+1) %>
+</div>
 <div class="container mx-auto flex justify-between">
 	<% first_days.each do  |first_day| %>
 		<div class="border-l w-full">