diff --git a/charts/ohayodash/values.yaml b/charts/ohayodash/values.yaml
index 303818f..aa84fee 100644
--- a/charts/ohayodash/values.yaml
+++ b/charts/ohayodash/values.yaml
@@ -18,6 +18,8 @@ image:
 env:
   # -- Set the container timezone
   TZ: UTC
+  # -- Python date format string to use for rendering the date/time
+  DATE_FORMAT: "%Y-%m-%d %H:%M"
 
 # -- Configures service settings for the chart.
 # @default -- See values.yaml
diff --git a/ohayodash/base.py b/ohayodash/base.py
index 97bfb5c..1a8448b 100644
--- a/ohayodash/base.py
+++ b/ohayodash/base.py
@@ -94,6 +94,11 @@ def get_greeting():
     return 'こんにちは'
 
 
+@base.app_template_filter()
+def format_datetime(value, format='medium'):
+    return value.strftime(os.environ.get('DATE_FORMAT', '%Y-%m-%d %H:%M'))  # noqa: WPS323
+
+
 @base.route('/')
 def index():
     return render_template('index.j2',
diff --git a/ohayodash/templates/index.j2 b/ohayodash/templates/index.j2
index 54a9d3c..b263889 100644
--- a/ohayodash/templates/index.j2
+++ b/ohayodash/templates/index.j2
@@ -53,7 +53,7 @@
 
         <section id="header">
             <h1>{{ greeting | default("Welcome")}}</h1>
-            <h2>{{ now }}</h2>
+            <h2>{{ now | format_datetime }}</h2>
         </section>
 
         {% if applications %}