diff --git a/map/fields.py b/map/fields.py
index ad7eab7..052475d 100644
--- a/map/fields.py
+++ b/map/fields.py
@@ -6,6 +6,6 @@ class CoordinateField(models.DecimalField):
         kwargs['max_digits'] = 11
         kwargs['decimal_places'] = 8
         kwargs['help_text'] = ('Format : xxx,xxxxxxxx<br>'
-                               '(max 8 décimales, max 3 chiffres avant la virgule, séparateur : virgule)')
+                               '(max 8 decimal places, max 3 digits before comma, separator : comma)')
 
         super().__init__(*args, **kwargs)
diff --git a/map/migrations/0006_auto_20190303_1308.py b/map/migrations/0006_auto_20190303_1308.py
new file mode 100644
index 0000000..a30be14
--- /dev/null
+++ b/map/migrations/0006_auto_20190303_1308.py
@@ -0,0 +1,23 @@
+# Generated by Django 2.1.7 on 2019-03-03 12:08
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('map', '0005_auto_20190302_1457'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='friendlocation',
+            name='end_date',
+            field=models.DateField(blank=True, help_text='Format : YYYY-MM-DD, example : 2018-05-31', null=True, verbose_name='until'),
+        ),
+        migrations.AlterField(
+            model_name='friendlocation',
+            name='start_date',
+            field=models.DateField(blank=True, help_text='Format : YYYY-MM-DD, example : 2018-05-31', null=True, verbose_name='from'),
+        ),
+    ]
diff --git a/map/models.py b/map/models.py
index 5aa574c..0d88eb4 100644
--- a/map/models.py
+++ b/map/models.py
@@ -24,8 +24,8 @@ class Friend(AbstractUser):
 class FriendLocation(BaseModel):
     latitude = CoordinateField()
     longitude = CoordinateField()
-    start_date = models.DateField('from', blank=True, null=True)
-    end_date = models.DateField('until', blank=True, null=True)
+    start_date = models.DateField('from', blank=True, null=True, help_text='Format : YYYY-MM-DD, example : 2018-05-31')
+    end_date = models.DateField('until', blank=True, null=True, help_text='Format : YYYY-MM-DD, example : 2018-05-31')
     friend = models.OneToOneField(Friend, on_delete=models.CASCADE, related_name='location')
 
     @property