diff --git a/cof/locale/en/__init__.py b/cof/locale/en/__init__.py
new file mode 100644
index 00000000..e69de29b
diff --git a/cof/locale/en/formats.py b/cof/locale/en/formats.py
new file mode 100644
index 00000000..9d3bad35
--- /dev/null
+++ b/cof/locale/en/formats.py
@@ -0,0 +1,11 @@
+# -*- encoding: utf-8 -*-
+
+"""
+Formats français.
+"""
+
+from __future__ import unicode_literals
+
+DATETIME_FORMAT = r'l N j, Y \a\t P'
+DATE_FORMAT = r'l N j, Y'
+TIME_FORMAT = r'P'
diff --git a/cof/locale/fr/formats.py b/cof/locale/fr/formats.py
index 710fa6ed..ae1aaa13 100644
--- a/cof/locale/fr/formats.py
+++ b/cof/locale/fr/formats.py
@@ -6,4 +6,6 @@ Formats français.
 
 from __future__ import unicode_literals
 
-DATETIME_FORMAT = r'l j F Y \à H:i'
+DATETIME_FORMAT = r'l j F Y \à H\hi'
+DATE_FORMAT = r'l j F Y'
+TIME_FORMAT = r'H\hi'
diff --git a/gestioncof/cms/templates/cofcms/calendar.html b/gestioncof/cms/templates/cofcms/calendar.html
index 02568f0d..a6a9d87e 100644
--- a/gestioncof/cms/templates/cofcms/calendar.html
+++ b/gestioncof/cms/templates/cofcms/calendar.html
@@ -1,4 +1,4 @@
-{% load wagtailcore_tags wagtailroutablepage_tags static %}
+{% load wagtailcore_tags wagtailroutablepage_tags static i18n %}
 <table class="calendar">
     <tbody>
         <tr>
@@ -6,7 +6,7 @@
             <th colspan="5">{{ this_month|date:"F Y" }}</th>
             <th><a href="javascript:void(0);" cal-dest="{{ next_month }}" class="cal-btn">&gt;</a></th>
         </tr>
-        <tr><th>L</th><th>M</th><th>M</th><th>J</th><th>V</th><th>S</th><th>D</th></tr>
+        <tr>{% blocktrans %}<th>L</th><th>M</th><th>M</th><th>J</th><th>V</th><th>S</th><th>D</th>{% endblocktrans %}</tr>
         {% for week in weeks %}
             <tr>
                 {% for day in week %}
@@ -14,7 +14,7 @@
                         {% if day.events %}
                             <a href="javascript:void(0)">{{ day.day }}</a>
                             <ul class="cal-events">
-                                <li class="datename">Le {{ day.date|date:"d F Y" }}</li>
+                                <li class="datename">{% trans "Le " %}{{ day.date|date }}</li>
                                 {% for event in day.events %}
                                     <li><a href="{% pageurl event %}">{{ event.title }}</a></li>
                                 {% endfor %}
diff --git a/gestioncof/cms/templates/cofcms/cof_actu_index_page.html b/gestioncof/cms/templates/cofcms/cof_actu_index_page.html
index 1e7878ab..a6a909db 100644
--- a/gestioncof/cms/templates/cofcms/cof_actu_index_page.html
+++ b/gestioncof/cms/templates/cofcms/cof_actu_index_page.html
@@ -15,7 +15,6 @@
 {% endblock %}
 
 {% block content %}
-    {% get_current_language as curlang %}
     <section class="intro">
         <h1>{{ page.title }}</h1>
         <div>{{ page.introduction|safe }}</div>
@@ -35,7 +34,7 @@
                 <div class="actu-infos">
                     <h2><a href="{% pageurl actu %}">{{ actu.title }}</a></h2>
                     {% if actu.is_event %}
-                        <p><span class="actu-dates">{{ actu|dates:curlang|capfirst }}</span><br />{{ actu.chapo }}</p>
+                        <p><span class="actu-dates">{{ actu|dates|capfirst }}</span><br />{{ actu.chapo }}</p>
                     {% else %}
                         {{ actu.body|safe|truncatewords_html:15 }}
                     {% endif %}
diff --git a/gestioncof/cms/templates/cofcms/cof_actu_page.html b/gestioncof/cms/templates/cofcms/cof_actu_page.html
index f4af9166..b531aedc 100644
--- a/gestioncof/cms/templates/cofcms/cof_actu_page.html
+++ b/gestioncof/cms/templates/cofcms/cof_actu_page.html
@@ -2,10 +2,9 @@
 {% load wagtailimages_tags cofcms_tags i18n %}
 
 {% block content %}
-    {% get_current_language as curlang %}
     <section class="intro">
         <h1>{{ page.title }}</h1>
-        <p class="date">A lieu {{ page|dates:curlang }}</p>
+        <p class="date">A lieu {{ page|dates }}</p>
         <p>{{ page.chapo }}</p>
     </section>
 
diff --git a/gestioncof/cms/templates/cofcms/cof_root_page.html b/gestioncof/cms/templates/cofcms/cof_root_page.html
index 3ec030a4..984b72dc 100644
--- a/gestioncof/cms/templates/cofcms/cof_root_page.html
+++ b/gestioncof/cms/templates/cofcms/cof_root_page.html
@@ -16,7 +16,6 @@
 {% endblock %}
 
 {% block content %}
-    {% get_current_language as curlang %}
     <section class="intro">
         <h1>{{ page.title }}</h1>
         <div>{{ page.introduction|safe }}</div>
@@ -30,7 +29,7 @@
                 </div>
                 <div class="actu-misc">
                     {% if actu.is_event %}
-                        <span class="actu-minical">{% mini_calendar actu %}</span><span class="actu-dates">{{ actu|dates:curlang }}</span>
+                        <span class="actu-minical">{% mini_calendar actu %}</span><span class="actu-dates">{{ actu|dates }}</span>
                     {% else %}
                         {{ actu.body|safe|truncatewords_html:10 }}
                     {% endif %}
diff --git a/gestioncof/cms/templatetags/cofcms_tags.py b/gestioncof/cms/templatetags/cofcms_tags.py
index 45b7950b..c0894b05 100644
--- a/gestioncof/cms/templatetags/cofcms_tags.py
+++ b/gestioncof/cms/templatetags/cofcms_tags.py
@@ -1,7 +1,7 @@
 from datetime import timedelta, date
 from django import template
 from django.conf import settings
-from django.utils import timezone
+from django.utils import timezone, formats
 import locale
 
 from django.utils.translation import ugettext as _
@@ -51,9 +51,7 @@ def calendar(context, month=None, year=None):
                     curevents.append(e)
             day = {'day': curday.day,
                    'date': curday,
-                   'class': (('today ' if (curday.day == now.day
-                                           and curday.month == now.month
-                                           and curday.year == now.year) else '')
+                   'class': (('today ' if curday == now.date() else '')
                              + ('in ' if (curday.month == month_start.month
                                           and curday.year == month_start.year)
                                 else 'out ')
@@ -72,11 +70,11 @@ def calendar(context, month=None, year=None):
     request = context['request']
     burl = utilpage.debugged_get_url(request) + "/"
     prev_url = burl + utilpage.reverse_subpage("calendar",
-                                               args=["%d" % (prev_month.year,),
-                                                     "%d" % (prev_month.month,)])
+                                               args=[str(prev_month.year),
+                                                     str(prev_month.month)])
     next_url = burl + utilpage.reverse_subpage("calendar",
-                                               args=["%d" % (next_month.year,),
-                                                     "%d" % (next_month.month,)])
+                                               args=[str(next_month.year),
+                                                     str(next_month.month)])
     context.push({"events": events, "weeks": weeks, "this_month": month_start,
                   "prev_month": prev_url, "next_month": next_url})
     return context
@@ -98,48 +96,43 @@ def mini_calendar(event):
 
 
 @register.filter()
-def dates(event, loc=None):
-    try:
-        if loc == "fr":
-            locale.setlocale(locale.LC_TIME, "fr_FR.UTF-8")
+def dates(event):
+    def factorize_suffix(a, b):
+        i = -1
+        imin = -min(len(a), len(b))
+        while i>imin and a[i] == b[i]:
+            i -= 1
+        if i == -1:
+            return (a, b, '')
         else:
-            locale.setlocale(locale.LC_TIME, "en_US.UTF-8")
-    except locale.Error as e:
-        pass
+            return (a[:i+1], b[:i+1], a[i+1:])
+    
+    datestart_string = formats.date_format(event.date_start)
+    timestart_string = formats.time_format(event.date_start)
     if event.date_end:
         if event.date_end.date() == event.date_start.date():
             if event.all_day:
-                return event.date_start.strftime(_("le %A %d %B %Y"))
+                return _("le %s") % datestart_string
             else:
                 return _("le %s de %s à %s") % \
-                    (event.date_start.strftime("%A %d %B %Y"),
-                     event.date_start.strftime(_("%Hh%M")),
-                     event.date_end.strftime(_("%Hh%M")))
+                    (datestart_string,
+                     timestart_string,
+                     formats.time_format(event.date_end))
         else:
-            tmpl = "%A %d %B %Y"
-            diff_i = len(tmpl)
-            if event.date_end.year != event.date_start.year:
-                diff_i = len(tmpl)
-            elif event.date_end.month != event.date_start.month:
-                diff_i = len(tmpl) - 3
-            elif event.date_end.day != event.date_start.day:
-                diff_i = len(tmpl) - 6
-            common = tmpl[diff_i:]
-            diff = tmpl[:diff_i]
+            dateend_string = formats.date_format(event.date_end)
+            timeend_string = formats.time_format(event.date_end)
+            diffstart, diffend, common = factorize_suffix(datestart_string,
+                                                          dateend_string)
             if event.all_day:
-                return _("du %s au %s %s") % \
-                    (event.date_start.strftime(diff),
-                     event.date_end.strftime(diff),
-                     event.date_end.strftime(common))
+                return _("du %s au %s%s") % \
+                    (diffstart, diffend, common)
+
             else:
-                return _("du %s %s à %s au %s à %s") % \
-                    (event.date_start.strftime(diff),
-                     event.date_start.strftime(common),
-                     event.date_start.strftime("%Hh%M"),
-                     event.date_end.strftime(diff),
-                     event.date_end.strftime("%Hh%M"))
+                return _("du %s%s à %s au %s à %s") % \
+                    (diffstart, common, timestart_string,
+                     diffend, formats.time_format(event.date_end))
     else:
         if event.all_day:
-            return event.date_start.strftime(_("le %A %d %B %Y"))
+            return _("le %s") % datestart_string
         else:
-            return event.date_start.strftime(_("le %A %d %B %Y à %Hh%M"))
+            return _("le %s à %s") % (datestart_string, timestart_string)