diff --git a/themes/nluug/layouts/custom/content-review.html b/themes/nluug/layouts/custom/content-review.html
index d884b58..191c68f 100644
--- a/themes/nluug/layouts/custom/content-review.html
+++ b/themes/nluug/layouts/custom/content-review.html
@@ -25,9 +25,9 @@
               {{ $reviewdate := $reviewdate.AddDate 0 0 .Params.review.period | time.Format "2006-01-02" }}
               <tr>
                 <td><a href="{{ .RelPermalink }}">{{ .Title | default .Site.Params.textNoTitle }}</a></td>
-                <td>{{ .Lastmod | dateFormat "2006-01-02 15:04:05" }}</td>
-                <td>{{ if .Params.review.last_review }}{{ .Params.review.last_review }}{{ else }}Onbekend{{ end }}</td>
-                <td>{{ with $reviewdate }}{{ . }}{{ end }}</td>
+                <td><time datetime="{{ .Lastmod | dateFormat "2006-01-02T15:04:05" }}">{{ .Lastmod | dateFormat "2006-01-02 15:04:05" }}</time></td>
+                <td>{{ if .Params.review.last_review }}<time datetime="{{ .Params.review.last_review | dateFormat "2006-01-02" }}">{{ .Params.review.last_review }}</time>{{ else }}Onbekend{{ end }}</td>
+                <td><time datetime="{{ $reviewdate | dateFormat "2006-01-02" }}">{{ $reviewdate }}</time></td>
                 <td>{{ with .Params.review.period }}{{ . }} dagen{{ end }}</td>
                 <td>
                     {{ if .Params.review.last_review }}
@@ -71,7 +71,7 @@
           {{ range where .Site.RegularPages "Params.review" "==" nil }}
               <tr>
                 <td><a href="{{ .RelPermalink }}">{{ .Title | default .Site.Params.textNoTitle }}</a></td>
-                <td>{{ .Lastmod | dateFormat "2006-01-02 15:04:05" }}</td>
+                <td><time datetime="{{ .Lastmod | dateFormat "2006-01-02T15:04:05" }}">{{ .Lastmod | dateFormat "2006-01-02 15:04:05" }}</time></td>
                 <td>{{ with .File }}{{ .Lang }}{{ end }}</td>
                 <td>{{ with .File }}{{ .Path }}{{ end }}</td>
               </tr>
diff --git a/themes/nluug/layouts/custom/latest-changes.html b/themes/nluug/layouts/custom/latest-changes.html
index bc110ac..7f87b13 100644
--- a/themes/nluug/layouts/custom/latest-changes.html
+++ b/themes/nluug/layouts/custom/latest-changes.html
@@ -19,7 +19,7 @@
         <tbody>
       {{ range first 50 $byLastMod }}
       <tr>
-        <td>{{ .Lastmod | dateFormat "2006-01-02 15:04:05" }}</td>
+        <td><time datetime="{{ .Lastmod | dateFormat "2006-01-02T15:04:05" }}">{{ .Lastmod | dateFormat "2006-01-02 15:04:05" }}</time></td>
         <td><a href="{{ .RelPermalink }}">{{ .Title | default .Site.Params.textNoTitle }}</a></td>
         {{ if .Site.IsServer }}
           <td>{{ with .File }}{{ .Lang }}{{ end }}</td>
diff --git a/themes/nluug/layouts/custom/sitemap.html b/themes/nluug/layouts/custom/sitemap.html
index 659a253..2338983 100644
--- a/themes/nluug/layouts/custom/sitemap.html
+++ b/themes/nluug/layouts/custom/sitemap.html
@@ -27,7 +27,7 @@
         <tbody>
       {{ range first 20 $byLastMod }}
       <tr>
-        <td>{{ .Lastmod | dateFormat "2006-01-02 15:04:05" }}</td>
+        <td><time datetime="{{ .Lastmod | dateFormat "2006-01-02T15:04:05" }}">{{ .Lastmod | dateFormat "2006-01-02 15:04:05" }}</a></td>
         <td><a href="{{ .RelPermalink }}">{{ .Title }}</a></td>
         {{ if .Site.IsServer }}
           <td>{{ with .File }}{{ .Lang }}{{ end }}</td>
diff --git a/themes/nluug/layouts/index.html b/themes/nluug/layouts/index.html
index e359ca0..bff8e06 100644
--- a/themes/nluug/layouts/index.html
+++ b/themes/nluug/layouts/index.html
@@ -44,7 +44,7 @@
     <p>Naast de door ons georganiseerde evenementen staat er meer op de agenda.</p>
     <ul>
       {{ range first 10 (where $upcoming_events "date_start" "ge" (dateFormat "2006-01-02" now)) }}
-      <li>{{ .date_start | dateFormat "02-01-2006" }} - <a href="/evenementen/kalender/#{{ anchorize (.date_start | dateFormat "2006-01-02") }}-{{ anchorize .name }}">{{ .name }}</a></li>
+      <li><time datetime="{{ .date_start | dateFormat "2006-01-02" }}">{{ .date_start | dateFormat "02-01-2006" }}</time> - <a href="/evenementen/kalender/#{{ anchorize (.date_start | dateFormat "2006-01-02") }}-{{ anchorize .name }}">{{ .name }}</a></li>
       {{ end }}
     </ul>
     <p>&raquo; <a href="/evenementen/kalender/">Volledige evenementenkalender</a></p>