diff --git a/a5/templates/block/index.html.j2 b/a5/templates/block/index.html.j2
index 289c202..ef93c45 100644
--- a/a5/templates/block/index.html.j2
+++ b/a5/templates/block/index.html.j2
@@ -17,7 +17,7 @@
 {% for row in list %}
     <article class="card">
         <div class="contents">
-            <header>@ {{row['timestamp']}}</header>
+            <header>@ {{row['timestamp']|format_datetime}}</header>
             <div>
                 CO2: <b>{{row['co2']}}</b>
                 TVOC: <b>{{row['tvoc']}}</b>
diff --git a/a5/templates/block/measurements.html.j2 b/a5/templates/block/measurements.html.j2
index 8311752..cd17c6f 100644
--- a/a5/templates/block/measurements.html.j2
+++ b/a5/templates/block/measurements.html.j2
@@ -6,7 +6,7 @@
 {% for row in list %}
     <article class="card">
         <div class="contents">
-            <header>@ {{row['timestamp']}}</header>
+            <header>@ {{row['timestamp']|format_datetime}}</header>
             CO2: {{row['co2']}}
             TVOC: {{row['tvoc']}}
         </div>