diff --git a/trombi/migrations/0001_initial.py b/trombi/migrations/0001_initial.py
index a035c895e1842b6f8766ce5ce91c05caffa088f9..8c1f9a67636387b9ee6c2fc5eb05e57711b1d5b7 100644
--- a/trombi/migrations/0001_initial.py
+++ b/trombi/migrations/0001_initial.py
@@ -2,54 +2,54 @@
 from __future__ import unicode_literals
 
 from django.db import migrations, models
-import django.db.models.deletion
-import django.utils.timezone
 from django.conf import settings
+import datetime
+import django.db.models.deletion
 
 
 class Migration(migrations.Migration):
 
     dependencies = [
-        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
         ('club', '0007_auto_20170324_0917'),
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
     ]
 
     operations = [
         migrations.CreateModel(
             name='Trombi',
             fields=[
-                ('id', models.AutoField(primary_key=True, serialize=False, auto_created=True, verbose_name='ID')),
-                ('subscription_deadline', models.DateField(help_text='Before this date, users are allowed to subscribe to this Trombi. After this date, users subscribed will be allowed to comment on each other.', default=django.utils.timezone.now, verbose_name='subscription deadline')),
-                ('comments_deadline', models.DateField(help_text="After this date, users won't be able to make comments anymore.", default=django.utils.timezone.now, verbose_name='comments deadline')),
-                ('max_chars', models.IntegerField(help_text='Maximum number of characters allowed in a comment.', default=400, verbose_name='maximum characters')),
+                ('id', models.AutoField(serialize=False, auto_created=True, verbose_name='ID', primary_key=True)),
+                ('subscription_deadline', models.DateField(default=datetime.date.today, help_text='Before this date, users are allowed to subscribe to this Trombi. After this date, users subscribed will be allowed to comment on each other.', verbose_name='subscription deadline')),
+                ('comments_deadline', models.DateField(default=datetime.date.today, help_text="After this date, users won't be able to make comments anymore.", verbose_name='comments deadline')),
+                ('max_chars', models.IntegerField(default=400, help_text='Maximum number of characters allowed in a comment.', verbose_name='maximum characters')),
                 ('club', models.OneToOneField(to='club.Club', related_name='trombi')),
             ],
         ),
         migrations.CreateModel(
             name='TrombiComment',
             fields=[
-                ('id', models.AutoField(primary_key=True, serialize=False, auto_created=True, verbose_name='ID')),
+                ('id', models.AutoField(serialize=False, auto_created=True, verbose_name='ID', primary_key=True)),
                 ('content', models.TextField(default='', verbose_name='content')),
             ],
         ),
         migrations.CreateModel(
             name='TrombiUser',
             fields=[
-                ('id', models.AutoField(primary_key=True, serialize=False, auto_created=True, verbose_name='ID')),
-                ('profile_pict', models.ImageField(verbose_name='profile pict', upload_to='trombi', null=True, help_text='The profile picture you want in the trombi (warning: this picture may be published)', blank=True)),
-                ('scrub_pict', models.ImageField(verbose_name='scrub pict', upload_to='trombi', null=True, help_text='The scrub picture you want in the trombi (warning: this picture may be published)', blank=True)),
-                ('trombi', models.ForeignKey(on_delete=django.db.models.deletion.SET_NULL, verbose_name='trombi', null=True, to='trombi.Trombi', blank=True, related_name='users')),
+                ('id', models.AutoField(serialize=False, auto_created=True, verbose_name='ID', primary_key=True)),
+                ('profile_pict', models.ImageField(upload_to='trombi', blank=True, help_text='The profile picture you want in the trombi (warning: this picture may be published)', verbose_name='profile pict', null=True)),
+                ('scrub_pict', models.ImageField(upload_to='trombi', blank=True, help_text='The scrub picture you want in the trombi (warning: this picture may be published)', verbose_name='scrub pict', null=True)),
+                ('trombi', models.ForeignKey(to='trombi.Trombi', blank=True, verbose_name='trombi', related_name='users', on_delete=django.db.models.deletion.SET_NULL, null=True)),
                 ('user', models.OneToOneField(verbose_name='trombi user', to=settings.AUTH_USER_MODEL, related_name='trombi_user')),
             ],
         ),
         migrations.AddField(
             model_name='trombicomment',
             name='author',
-            field=models.ForeignKey(verbose_name='author', to='trombi.TrombiUser', related_name='given_comments'),
+            field=models.ForeignKey(to='trombi.TrombiUser', verbose_name='author', related_name='given_comments'),
         ),
         migrations.AddField(
             model_name='trombicomment',
             name='target',
-            field=models.ForeignKey(verbose_name='target', to='trombi.TrombiUser', related_name='received_comments'),
+            field=models.ForeignKey(to='trombi.TrombiUser', verbose_name='target', related_name='received_comments'),
         ),
     ]
diff --git a/trombi/models.py b/trombi/models.py
index b24bf03bba7e2af359da79c55a06cf84a892ba55..6ed701b2407658f1e4c8e4045716a02329ce51f6 100644
--- a/trombi/models.py
+++ b/trombi/models.py
@@ -26,7 +26,6 @@ from django.db import models
 from django.utils.translation import ugettext_lazy as _
 from django.core.urlresolvers import reverse
 from django.conf import settings
-from django.utils import timezone
 from django.core.exceptions import ValidationError
 
 from datetime import timedelta, date