{{ $dateRegExp := "^[0-9]{4}-1[0-2]|0[1-9]-(?:3[01]|0[1-9]|[12][0-9])T(?:2[0-3]|[01][0-9]):(?:[0-5][0-9]):(?:60|[0-5][0-9])$" }}
{{ $announcementShown := false }}
{{ range $.Site.Data.announcements }}
  {{ range .announcements }}
  {{ if or ( eq .endTime nil ) ( eq .message nil ) }}
    {{ errorf "Invalid announcement: %#v" . }}
  {{ end }}
  {{ if and (ne .startTime nil ) (lt ( len ( findRE $dateRegExp .startTime ) ) 1 ) }}
    {{ errorf "Invalid announcement start time: %#v" .startTime }}
  {{ end }}
  {{ if lt ( len ( findRE $dateRegExp .endTime ) ) 1 }}
    {{ errorf "Invalid announcement end time: %#v" .endTime }}
  {{ end }}
  {{ if or (eq .startTime nil ) (lt ( time .startTime ) now ) }}
    {{- if or (eq .endTime nil ) (gt ( time .endTime ) now ) -}}
      {{- if not $announcementShown -}}
      {{- $announcementShown = true -}}
  <section lang="en" id="announcement" style="background-color: #3371e3; color: #fff; {{ .style | safeCSS }}">
    <aside>
      <div class="content announcement main-section" data-nosnippet>
        {{ if .title }}
        <h4 class="announcement">
            {{ .title | markdownify }}
        </h4>
        {{ end }}
        <p class="announcement">{{ .message | markdownify }}</p>
      </div>
    </aside>
  </section>
      {{- end -}}
      {{- end -}}
    {{- end -}}
  {{ end }}
{{ end }}