Redmine/app/views/versions/_form.rhtml

<%= error_messages_for 'version' %>

<div class="box">
<!--[form:version]-->
<p><%= f.text_field :name, :size => 20, :required => true %></p>
<p><%= f.text_field :description, :size => 60 %></p>
<p><%= f.text_field :effective_date, :size => 10 %><%= calendar_for('version_effective_date') %></p>
<!--[eoform:version]-->
</div>

<% content_for :header_tags do %>
<%= javascript_include_tag 'calendar/calendar' %>
<%= javascript_include_tag "calendar/lang/calendar-#{current_language}.js" %>
<%= javascript_include_tag 'calendar/calendar-setup' %>
<%= stylesheet_link_tag 'calendar' %>
<% end %>