diff --git a/boards/management/commands/enforce_privacy.py b/boards/management/commands/enforce_privacy.py
--- a/boards/management/commands/enforce_privacy.py
+++ b/boards/management/commands/enforce_privacy.py
@@ -1,5 +1,9 @@
+from datetime import datetime, timedelta, date
+from datetime import time as dtime
+
 from django.core.management import BaseCommand
 from django.db import transaction
+from django.utils import timezone
 
 from boards.models import Post
 from boards.models.post.manager import NO_IP
@@ -8,8 +12,23 @@ from boards.models.post.manager import N
 
 
 class Command(BaseCommand):
-    help = 'Removes user and IP data from all posts'
+    help = 'Removes user and IP data from posts'
+
+    def add_arguments(self, parser):
+        parser.add_argument('--days-before', type=int,
+                            help='Clean posts only before the number of days before today.')
 
     @transaction.atomic
     def handle(self, *args, **options):
-        Post.objects.all().update(poster_ip=NO_IP)
\ No newline at end of file
+        days_before = options.get('days_before')
+
+        if days_before:
+            day_end = date.today() - timedelta(1)
+
+            day_time_end = timezone.make_aware(datetime.combine(
+                day_end, dtime()), timezone.get_current_timezone())
+            posts = Post.objects.filter(pub_time__lte=day_time_end)
+        else:
+            posts = Post.objects.all()
+        posts.update(poster_ip=NO_IP)
+
diff --git a/boards/models/post/manager.py b/boards/models/post/manager.py
--- a/boards/models/post/manager.py
+++ b/boards/models/post/manager.py
@@ -134,7 +134,6 @@ class PostManager(models.Manager):
             pub_time__lte=day_time_end,
             pub_time__gte=day_time_start).count()
 
-
     @transaction.atomic
     def import_post(self, title: str, text: str, pub_time: str, global_id,
                     opening_post=None, tags=list(), files=list(),