diff --git a/cypress/integration/origin-visits.spec.js b/cypress/integration/origin-visits.spec.js
--- a/cypress/integration/origin-visits.spec.js
+++ b/cypress/integration/origin-visits.spec.js
@@ -31,7 +31,7 @@
     .trigger('mouseenter')
     .get('.popover-body')
     .should('be.visible')
-    .and('contain', `${date.hours}:${date.minutes} UTC`);
+    .and('contain', `${date.hours}:${date.minutes}:${date.seconds} UTC`);
 }
 
 describe('Visits tests', function() {
diff --git a/cypress/utils/index.js b/cypress/utils/index.js
--- a/cypress/utils/index.js
+++ b/cypress/utils/index.js
@@ -22,7 +22,8 @@
     monthName: date.toLocaleString('en', {month: 'long'}),
     year: date.getUTCFullYear(),
     hours: pad(date.getUTCHours()),
-    minutes: pad(date.getUTCMinutes())
+    minutes: pad(date.getUTCMinutes()),
+    seconds: pad(date.getUTCSeconds())
   };
 
   return time;
diff --git a/swh/web/common/utils.py b/swh/web/common/utils.py
--- a/swh/web/common/utils.py
+++ b/swh/web/common/utils.py
@@ -158,7 +158,7 @@
     return re.sub(sha1_re, r"\1...", ret)
 
 
-def format_utc_iso_date(iso_date, fmt="%d %B %Y, %H:%M UTC"):
+def format_utc_iso_date(iso_date, fmt="%d %B %Y, %H:%M:%S UTC"):
     """Turns a string representation of an ISO 8601 datetime string
     to UTC and format it into a more human readable one.
 
diff --git a/swh/web/tests/common/test_utils.py b/swh/web/tests/common/test_utils.py
--- a/swh/web/tests/common/test_utils.py
+++ b/swh/web/tests/common/test_utils.py
@@ -87,7 +87,7 @@
 def test_format_utc_iso_date():
     assert (
         utils.format_utc_iso_date("2017-05-04T13:27:13+02:00")
-        == "04 May 2017, 11:27 UTC"
+        == "04 May 2017, 11:27:13 UTC"
     )