{{ if .Site.Data.cosin.registration_open }}
  <p>
    Registration for this year's CoSin is open:
  </p>
  <ul>
    <li><a href="{{ .Site.Data.cosin.registration_url }}">Registration CoSin {{ .Site.Data.cosin.date_year }}</a></li>
  </ul>
{{ else }}
  <p>
    The registration is currently closed.
  </p>
{{ end }}