diff --git a/oioioi/statistics/tests.py b/oioioi/statistics/tests.py
index ea29d62be..78efb2ac3 100644
--- a/oioioi/statistics/tests.py
+++ b/oioioi/statistics/tests.py
@@ -262,7 +262,7 @@ def test_round_info(self):
                     self.assertTrue(ri['start_relative'] == 'Started')
                     self.assertTrue(ri['end_relative'] == 'Finished')
                 if ri['name'] == 'Future round':
-                    self.assertTrue(ri['start_relative'] == '360 days, 20:27:58')
+                    self.assertTrue(ri['start_relative'] == '11 months')
 
     def test_questions_info(self):
         contest = Contest.objects.get()
diff --git a/oioioi/statistics/views.py b/oioioi/statistics/views.py
index 8b39cd5d8..7d95e6d14 100644
--- a/oioioi/statistics/views.py
+++ b/oioioi/statistics/views.py
@@ -9,6 +9,7 @@
 from django.urls import reverse
 from django.utils.translation import gettext_lazy as _
 from django.db.models import F
+from humanize import naturaldelta
 
 from oioioi.base.menu import menu_registry
 from oioioi.base.permissions import enforce_condition
@@ -198,13 +199,13 @@ def get_rounds_info(request):
     for round_, rt in rounds_times(request, request.contest).items():
         round_time_info = {'name': str(round_), 'start': rt.start or _("Not set")}
         if rt.start:
-            round_time_info['start_relative'] = str(rt.start - request.timestamp)[:-7] if rt.is_future(
+            round_time_info['start_relative'] = naturaldelta(rt.start - request.timestamp) if rt.is_future(
                 request.timestamp) else _("Started")
         else:
             round_time_info['start_relative'] = _("Not set")
         round_time_info['end'] = rt.end or _("Not set")
         if rt.end:
-            round_time_info['end_relative'] = str(rt.end - request.timestamp)[:-7] if not rt.is_past(
+            round_time_info['end_relative'] = naturaldelta(rt.end - request.timestamp) if not rt.is_past(
                 request.timestamp) else _("Finished")
         else:
             round_time_info['end_relative'] = _("Not set")
@@ -217,7 +218,7 @@ def get_attachments_info(request):
     for attachment in attachments:
         pub_date_relative = None
         if attachment.pub_date:
-            pub_date_relative = str(attachment.pub_date - request.timestamp)[:-7] \
+            pub_date_relative = naturaldelta(attachment.pub_date - request.timestamp) \
                 if attachment.pub_date > request.timestamp else _("Published")
         setattr(attachment, 'pub_date_relative', pub_date_relative)
     return attachments
diff --git a/setup.py b/setup.py
index b1697aec0..02d360688 100644
--- a/setup.py
+++ b/setup.py
@@ -63,6 +63,8 @@
     # A library allowing to nest inlines in django admin.
     # Used in quizzes module for adding new quizzes.
     "django-nested-admin>=4.0,<4.1",
+    # Library for parsing dates and timedelta
+    "humanize<=4.9.0",
     # SIO2 dependencies:
     "filetracker>=2.1,<3.0",
     "django-simple-captcha>=0.5,<=0.5.18",