diff --git a/themes/outerspace/layouts/_default/single.html b/themes/outerspace/layouts/_default/single.html
index 3da1d31..e49794a 100644
--- a/themes/outerspace/layouts/_default/single.html
+++ b/themes/outerspace/layouts/_default/single.html
@@ -5,7 +5,7 @@
 
             {{ if eq .Section "posts" }}
             <p class="meta">
-              <time class="date">{{ .Date.Format "2 January, 2006" }}</time>
+              <time class="date" datatime="{{ .Date.Format "2006-01-02" }}">{{ .Date.Format "2 January, 2006" }}</time>
               • tagged {{ partial "post/tag/list" . }}
               • {{ .WordCount }} words
               • ~{{ .ReadingTime }} minutes