diff --git a/src/__phutil_library_map__.php b/src/__phutil_library_map__.php
--- a/src/__phutil_library_map__.php
+++ b/src/__phutil_library_map__.php
@@ -2130,6 +2130,7 @@
     'PhabricatorCalendarImportICSFileTransaction' => 'applications/calendar/xaction/PhabricatorCalendarImportICSFileTransaction.php',
     'PhabricatorCalendarImportICSLogType' => 'applications/calendar/importlog/PhabricatorCalendarImportICSLogType.php',
     'PhabricatorCalendarImportICSURITransaction' => 'applications/calendar/xaction/PhabricatorCalendarImportICSURITransaction.php',
+    'PhabricatorCalendarImportICSWarningLogType' => 'applications/calendar/importlog/PhabricatorCalendarImportICSWarningLogType.php',
     'PhabricatorCalendarImportIgnoredNodeLogType' => 'applications/calendar/importlog/PhabricatorCalendarImportIgnoredNodeLogType.php',
     'PhabricatorCalendarImportListController' => 'applications/calendar/controller/PhabricatorCalendarImportListController.php',
     'PhabricatorCalendarImportLog' => 'applications/calendar/storage/PhabricatorCalendarImportLog.php',
@@ -6991,6 +6992,7 @@
     'PhabricatorCalendarImportICSFileTransaction' => 'PhabricatorCalendarImportTransactionType',
     'PhabricatorCalendarImportICSLogType' => 'PhabricatorCalendarImportLogType',
     'PhabricatorCalendarImportICSURITransaction' => 'PhabricatorCalendarImportTransactionType',
+    'PhabricatorCalendarImportICSWarningLogType' => 'PhabricatorCalendarImportLogType',
     'PhabricatorCalendarImportIgnoredNodeLogType' => 'PhabricatorCalendarImportLogType',
     'PhabricatorCalendarImportListController' => 'PhabricatorCalendarController',
     'PhabricatorCalendarImportLog' => array(
diff --git a/src/applications/calendar/import/PhabricatorCalendarICSImportEngine.php b/src/applications/calendar/import/PhabricatorCalendarICSImportEngine.php
--- a/src/applications/calendar/import/PhabricatorCalendarICSImportEngine.php
+++ b/src/applications/calendar/import/PhabricatorCalendarICSImportEngine.php
@@ -28,6 +28,17 @@
       $document = null;
     }
 
+    foreach ($parser->getWarnings() as $warning) {
+      $import->newLogMessage(
+        PhabricatorCalendarImportICSWarningLogType::LOGTYPE,
+        array(
+          'ics.warning.code' => $warning['code'],
+          'ics.warning.line' => $warning['line'],
+          'ics.warning.text' => $warning['text'],
+          'ics.warning.message' => $warning['message'],
+        ));
+    }
+
     return $this->importEventDocument($viewer, $import, $document);
   }
 
diff --git a/src/applications/calendar/importlog/PhabricatorCalendarImportICSWarningLogType.php b/src/applications/calendar/importlog/PhabricatorCalendarImportICSWarningLogType.php
new file mode 100644
--- /dev/null
+++ b/src/applications/calendar/importlog/PhabricatorCalendarImportICSWarningLogType.php
@@ -0,0 +1,37 @@
+<?php
+
+final class PhabricatorCalendarImportICSWarningLogType
+  extends PhabricatorCalendarImportLogType {
+
+  const LOGTYPE = 'ics.warning';
+
+  public function getDisplayType(
+    PhabricatorUser $viewer,
+    PhabricatorCalendarImportLog $log) {
+    return pht('ICS Parser Warning');
+  }
+
+  public function getDisplayDescription(
+    PhabricatorUser $viewer,
+    PhabricatorCalendarImportLog $log) {
+    return pht(
+      'Warning ("%s") while parsing ICS data (near line %s): %s',
+      $log->getParameter('ics.warning.code'),
+      $log->getParameter('ics.warning.line'),
+      $log->getParameter('ics.warning.message'));
+  }
+
+
+  public function getDisplayIcon(
+    PhabricatorUser $viewer,
+    PhabricatorCalendarImportLog $log) {
+    return 'fa-exclamation-triangle';
+  }
+
+  public function getDisplayColor(
+    PhabricatorUser $viewer,
+    PhabricatorCalendarImportLog $log) {
+    return 'yellow';
+  }
+
+}