Use timezone dates

Fixes #114

fedireads/migrations/0025_auto_20200330_0037.py

@@ -0,0 +1,24 @@
+# Generated by Django 3.0.3 on 2020-03-30 00:37
+
+from django.db import migrations, models
+import django.utils.timezone
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('fedireads', '0024_federatedserver_application_version'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='book',
+            name='last_sync_date',
+            field=models.DateTimeField(default=django.utils.timezone.now),
+        ),
+        migrations.AlterField(
+            model_name='status',
+            name='published_date',
+            field=models.DateTimeField(default=django.utils.timezone.now),
+        ),
+    ]