diff --git a/calsocial/__init__.py b/calsocial/__init__.py
index 452e40d..00779f9 100644
--- a/calsocial/__init__.py
+++ b/calsocial/__init__.py
@@ -86,7 +86,11 @@ class CalendarSocialApp(Flask):
         # Make sure we look up users both by their usernames and email addresses
         self.config['SECURITY_USER_IDENTITY_ATTRIBUTES'] = ('username', 'email')
         self.config['SECURITY_LOGIN_USER_TEMPLATE'] = 'login.html'
+
+        self.jinja_env.policies['ext.i18n.trimmed'] = True  # pylint: disable=no-member
+
         db.init_app(self)
+
         babel = Babel(app=self)
         babel.localeselector(get_locale)
 
diff --git a/calsocial/templates/base.html b/calsocial/templates/base.html
index cb75be9..f363a54 100644
--- a/calsocial/templates/base.html
+++ b/calsocial/templates/base.html
@@ -29,7 +29,9 @@
                     <a class="item" href="{{ url_for('security.login') }}">{% trans %}Login{% endtrans %}</a>
 {% else %}
                     <div class="item">
-                        {{ _('Logged in as %(username)s', username=('<a href="' + url_for('display_profile', username=current_user.username) + '">' + current_user.username + '</a>') | safe) }}
+    {% trans username=('<a href="' + url_for('display_profile', username=current_user.username) + '">' + current_user.username + '</a>') | safe -%}
+                        Logged in as {{username}}
+    {%- endtrans %}
                     </div>
                     <a class="item" href="{{ url_for('hello') }}">{% trans %}Calendar view{% endtrans %}</a>
                     <a class="item" href="{{ url_for('notifications') }}">{% trans %}Notifications{% endtrans %}</a>
diff --git a/calsocial/templates/event-details.html b/calsocial/templates/event-details.html
index 8af533d..6017549 100644
--- a/calsocial/templates/event-details.html
+++ b/calsocial/templates/event-details.html
@@ -1,17 +1,21 @@
 {% extends 'base.html' %}
 {% from '_macros.html' import field %}
 
+{% macro time_zone_warning() %}
+    {% trans timezone=event.time_zone, start_time=event.start_time_tz | datetimeformat(rebase=false), end_time=event.end_time_tz | datetimeformat(rebase=false) -%}
+This event is organised in the {{timezone}} time zone, in which it happens between {{start_time}} and {{end_time}}
+    {%- endtrans %}
+{% endmacro %}
+
 {% block content %}
 <h2 class="ui header">
     <div class="content">
         {{ event.title }}<br>
         <div class="sub header">
     {%- if current_user.timezone | string != event.time_zone -%}
-            <span title="{{ _('This event is organised in the %(timezone)s time zone, in which it happens between %(start_time)s and %(end_time)s', timezone=event.time_zone, start_time=event.start_time_tz|datetimeformat(rebase=false), end_time=event.end_time_tz|datetimeformat(rebase=false)) }}">
+            <span title="{{ time_zone_warning() }}">
                 <i class="fa fa-exclamation-triangle timezone-warning"></i>
-                <span class="sr-only">
-                    {{ _('This event is organised in the %(timezone)s time zone, in which it happens between %(start_time)s and %(end_time)s', timezone=event.time_zone, start_time=event.start_time_tz, end_time=event.end_time_tz) }}
-                </span>
+                <span class="sr-only">{{ time_zone_warning() }}</span>
             </span>
     {% endif %}
             {{ event.start_time_for_user(current_user) | datetimeformat(rebase=false) }}
diff --git a/calsocial/templates/index.html b/calsocial/templates/index.html
index 2e86f2b..276fc1c 100644
--- a/calsocial/templates/index.html
+++ b/calsocial/templates/index.html
@@ -1,7 +1,9 @@
 {% extends 'base.html' %}
 
 {% block content %}
-{{ _('Welcome to Calendar.social, %(username)s!', username=current_user.username) }}
+{% trans username=current_user.username -%}
+Welcome to Calendar.social, {{username}}!
+{%- endtrans %}
 
 {% include 'month-view.html' %}