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
@@ -2100,7 +2100,9 @@
     'PhabricatorCalendarExportViewController' => 'applications/calendar/controller/PhabricatorCalendarExportViewController.php',
     'PhabricatorCalendarHoliday' => 'applications/calendar/storage/PhabricatorCalendarHoliday.php',
     'PhabricatorCalendarHolidayTestCase' => 'applications/calendar/storage/__tests__/PhabricatorCalendarHolidayTestCase.php',
+    'PhabricatorCalendarICSFileImportEngine' => 'applications/calendar/import/PhabricatorCalendarICSFileImportEngine.php',
     'PhabricatorCalendarICSImportEngine' => 'applications/calendar/import/PhabricatorCalendarICSImportEngine.php',
+    'PhabricatorCalendarICSURIImportEngine' => 'applications/calendar/import/PhabricatorCalendarICSURIImportEngine.php',
     'PhabricatorCalendarICSWriter' => 'applications/calendar/util/PhabricatorCalendarICSWriter.php',
     'PhabricatorCalendarIconSet' => 'applications/calendar/icon/PhabricatorCalendarIconSet.php',
     'PhabricatorCalendarImport' => 'applications/calendar/storage/PhabricatorCalendarImport.php',
@@ -2117,9 +2119,11 @@
     'PhabricatorCalendarImportEmptyLogType' => 'applications/calendar/importlog/PhabricatorCalendarImportEmptyLogType.php',
     'PhabricatorCalendarImportEngine' => 'applications/calendar/import/PhabricatorCalendarImportEngine.php',
     'PhabricatorCalendarImportEpochLogType' => 'applications/calendar/importlog/PhabricatorCalendarImportEpochLogType.php',
+    'PhabricatorCalendarImportFetchLogType' => 'applications/calendar/importlog/PhabricatorCalendarImportFetchLogType.php',
     'PhabricatorCalendarImportFrequencyLogType' => 'applications/calendar/importlog/PhabricatorCalendarImportFrequencyLogType.php',
     'PhabricatorCalendarImportICSFileTransaction' => 'applications/calendar/xaction/PhabricatorCalendarImportICSFileTransaction.php',
     'PhabricatorCalendarImportICSLogType' => 'applications/calendar/importlog/PhabricatorCalendarImportICSLogType.php',
+    'PhabricatorCalendarImportICSURITransaction' => 'applications/calendar/xaction/PhabricatorCalendarImportICSURITransaction.php',
     'PhabricatorCalendarImportIgnoredNodeLogType' => 'applications/calendar/importlog/PhabricatorCalendarImportIgnoredNodeLogType.php',
     'PhabricatorCalendarImportListController' => 'applications/calendar/controller/PhabricatorCalendarImportListController.php',
     'PhabricatorCalendarImportLog' => 'applications/calendar/storage/PhabricatorCalendarImportLog.php',
@@ -6931,7 +6935,9 @@
     'PhabricatorCalendarExportViewController' => 'PhabricatorCalendarController',
     'PhabricatorCalendarHoliday' => 'PhabricatorCalendarDAO',
     'PhabricatorCalendarHolidayTestCase' => 'PhabricatorTestCase',
+    'PhabricatorCalendarICSFileImportEngine' => 'PhabricatorCalendarICSImportEngine',
     'PhabricatorCalendarICSImportEngine' => 'PhabricatorCalendarImportEngine',
+    'PhabricatorCalendarICSURIImportEngine' => 'PhabricatorCalendarICSImportEngine',
     'PhabricatorCalendarICSWriter' => 'Phobject',
     'PhabricatorCalendarIconSet' => 'PhabricatorIconSet',
     'PhabricatorCalendarImport' => array(
@@ -6953,9 +6959,11 @@
     'PhabricatorCalendarImportEmptyLogType' => 'PhabricatorCalendarImportLogType',
     'PhabricatorCalendarImportEngine' => 'Phobject',
     'PhabricatorCalendarImportEpochLogType' => 'PhabricatorCalendarImportLogType',
+    'PhabricatorCalendarImportFetchLogType' => 'PhabricatorCalendarImportLogType',
     'PhabricatorCalendarImportFrequencyLogType' => 'PhabricatorCalendarImportLogType',
     'PhabricatorCalendarImportICSFileTransaction' => 'PhabricatorCalendarImportTransactionType',
     'PhabricatorCalendarImportICSLogType' => 'PhabricatorCalendarImportLogType',
+    'PhabricatorCalendarImportICSURITransaction' => 'PhabricatorCalendarImportTransactionType',
     'PhabricatorCalendarImportIgnoredNodeLogType' => 'PhabricatorCalendarImportLogType',
     'PhabricatorCalendarImportListController' => 'PhabricatorCalendarController',
     'PhabricatorCalendarImportLog' => array(
diff --git a/src/applications/calendar/import/PhabricatorCalendarICSImportEngine.php b/src/applications/calendar/import/PhabricatorCalendarICSFileImportEngine.php
copy from src/applications/calendar/import/PhabricatorCalendarICSImportEngine.php
copy to src/applications/calendar/import/PhabricatorCalendarICSFileImportEngine.php
--- a/src/applications/calendar/import/PhabricatorCalendarICSImportEngine.php
+++ b/src/applications/calendar/import/PhabricatorCalendarICSFileImportEngine.php
@@ -1,9 +1,9 @@
 <?php
 
-final class PhabricatorCalendarICSImportEngine
-  extends PhabricatorCalendarImportEngine {
+final class PhabricatorCalendarICSFileImportEngine
+  extends PhabricatorCalendarICSImportEngine {
 
-  const ENGINETYPE = 'ics';
+  const ENGINETYPE = 'icsfile';
 
   public function getImportEngineName() {
     return pht('Import .ics File');
@@ -17,7 +17,6 @@
     return pht('Import an event in ".ics" (iCalendar) format.');
   }
 
-
   public function appendImportProperties(
     PhabricatorUser $viewer,
     PhabricatorCalendarImport $import,
@@ -80,27 +79,7 @@
 
     $data = $file->loadFileData();
 
-    $parser = new PhutilICSParser();
-
-    try {
-      $document = $parser->parseICSData($data);
-    } catch (PhutilICSParserException $ex) {
-      // TODO: In theory, it would be nice to store these in a fully abstract
-      // form so they can be translated at display time. As-is, we'll store the
-      // error messages in whatever language we were using when the parser
-      // failure occurred.
-
-      $import->newLogMessage(
-        PhabricatorCalendarImportICSLogType::LOGTYPE,
-        array(
-          'ics.code' => $ex->getParserFailureCode(),
-          'ics.message' => $ex->getMessage(),
-        ));
-
-      $document = null;
-    }
-
-    return $this->importEventDocument($viewer, $import, $document);
+    return $this->importICSData($viewer, $import, $data);
   }
 
 
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
@@ -1,84 +1,12 @@
 <?php
 
-final class PhabricatorCalendarICSImportEngine
+abstract class PhabricatorCalendarICSImportEngine
   extends PhabricatorCalendarImportEngine {
 
-  const ENGINETYPE = 'ics';
-
-  public function getImportEngineName() {
-    return pht('Import .ics File');
-  }
-
-  public function getImportEngineTypeName() {
-    return pht('.ics File');
-  }
-
-  public function getImportEngineHint() {
-    return pht('Import an event in ".ics" (iCalendar) format.');
-  }
-
-
-  public function appendImportProperties(
+  final protected function importICSData(
     PhabricatorUser $viewer,
     PhabricatorCalendarImport $import,
-    PHUIPropertyListView $properties) {
-
-    $phid_key = PhabricatorCalendarImportICSFileTransaction::PARAMKEY_FILE;
-    $file_phid = $import->getParameter($phid_key);
-
-    $properties->addProperty(
-      pht('Source File'),
-      $viewer->renderHandle($file_phid));
-  }
-
-  public function newEditEngineFields(
-    PhabricatorEditEngine $engine,
-    PhabricatorCalendarImport $import) {
-    $fields = array();
-
-    if ($engine->getIsCreate()) {
-      $fields[] = id(new PhabricatorFileEditField())
-        ->setKey('icsFilePHID')
-        ->setLabel(pht('ICS File'))
-        ->setDescription(pht('ICS file to import.'))
-        ->setTransactionType(
-          PhabricatorCalendarImportICSFileTransaction::TRANSACTIONTYPE)
-        ->setConduitDescription(pht('File PHID to import.'))
-        ->setConduitTypeDescription(pht('File PHID.'));
-    }
-
-    return $fields;
-  }
-
-  public function getDisplayName(PhabricatorCalendarImport $import) {
-    $filename_key = PhabricatorCalendarImportICSFileTransaction::PARAMKEY_NAME;
-    $filename = $import->getParameter($filename_key);
-    if (strlen($filename)) {
-      return pht('ICS File "%s"', $filename);
-    } else {
-      return pht('ICS File');
-    }
-  }
-
-  public function didCreateImport(
-    PhabricatorUser $viewer,
-    PhabricatorCalendarImport $import) {
-
-    $phid_key = PhabricatorCalendarImportICSFileTransaction::PARAMKEY_FILE;
-    $file_phid = $import->getParameter($phid_key);
-
-    $file = id(new PhabricatorFileQuery())
-      ->setViewer($viewer)
-      ->withPHIDs(array($file_phid))
-      ->executeOne();
-    if (!$file) {
-      throw new Exception(
-        pht(
-          'Unable to load file ("%s") for import.',
-          $file_phid));
-    }
-
-    $data = $file->loadFileData();
+    $data) {
 
     $parser = new PhutilICSParser();
 
@@ -103,21 +31,4 @@
     return $this->importEventDocument($viewer, $import, $document);
   }
 
-
-  public function canDisable(
-    PhabricatorUser $viewer,
-    PhabricatorCalendarImport $import) {
-    return false;
-  }
-
-  public function explainCanDisable(
-    PhabricatorUser $viewer,
-    PhabricatorCalendarImport $import) {
-    return pht(
-      'You can not disable import of an ICS file because the entire import '.
-      'occurs immediately when you upload the file. There is no further '.
-      'activity to disable.');
-  }
-
-
 }
diff --git a/src/applications/calendar/import/PhabricatorCalendarICSURIImportEngine.php b/src/applications/calendar/import/PhabricatorCalendarICSURIImportEngine.php
new file mode 100644
--- /dev/null
+++ b/src/applications/calendar/import/PhabricatorCalendarICSURIImportEngine.php
@@ -0,0 +1,111 @@
+<?php
+
+final class PhabricatorCalendarICSURIImportEngine
+  extends PhabricatorCalendarICSImportEngine {
+
+  const ENGINETYPE = 'icsuri';
+
+  public function getImportEngineName() {
+    return pht('Import .ics URI');
+  }
+
+  public function getImportEngineTypeName() {
+    return pht('.ics URI');
+  }
+
+  public function getImportEngineHint() {
+    return pht('Import or subscribe to a calendar in .ics format by URI.');
+  }
+
+  public function appendImportProperties(
+    PhabricatorUser $viewer,
+    PhabricatorCalendarImport $import,
+    PHUIPropertyListView $properties) {
+
+    $uri_key = PhabricatorCalendarImportICSURITransaction::PARAMKEY_URI;
+    $uri = $import->getParameter($uri_key);
+
+    // Since the URI may contain a secret hash, don't show it to users who
+    // can not edit the import.
+    $can_edit = PhabricatorPolicyFilter::hasCapability(
+      $viewer,
+      $import,
+      PhabricatorPolicyCapability::CAN_EDIT);
+    if (!$can_edit) {
+      $uri_display = phutil_tag('em', array(), pht('Restricted'));
+    } else if (!PhabricatorEnv::isValidRemoteURIForLink($uri)) {
+      $uri_display = $uri;
+    } else {
+      $uri_display = phutil_tag(
+        'a',
+        array(
+          'href' => $uri,
+          'target' => '_blank',
+        ),
+        $uri);
+    }
+
+    $properties->addProperty(pht('Source URI'), $uri_display);
+  }
+
+  public function newEditEngineFields(
+    PhabricatorEditEngine $engine,
+    PhabricatorCalendarImport $import) {
+    $fields = array();
+
+    if ($engine->getIsCreate()) {
+      $fields[] = id(new PhabricatorTextEditField())
+        ->setKey('uri')
+        ->setLabel(pht('URI'))
+        ->setDescription(pht('URI to import.'))
+        ->setTransactionType(
+          PhabricatorCalendarImportICSURITransaction::TRANSACTIONTYPE)
+        ->setConduitDescription(pht('URI to import.'))
+        ->setConduitTypeDescription(pht('New URI.'));
+    }
+
+    return $fields;
+  }
+
+  public function getDisplayName(PhabricatorCalendarImport $import) {
+    return pht('ICS URI');
+  }
+
+  public function didCreateImport(
+    PhabricatorUser $viewer,
+    PhabricatorCalendarImport $import) {
+
+    $uri_key = PhabricatorCalendarImportICSURITransaction::PARAMKEY_URI;
+    $uri = $import->getParameter($uri_key);
+
+    PhabricatorSystemActionEngine::willTakeAction(
+      array($viewer->getPHID()),
+      new PhabricatorFilesOutboundRequestAction(),
+      1);
+
+    $file = PhabricatorFile::newFromFileDownload(
+      $uri,
+      array(
+        'viewPolicy' => PhabricatorPolicies::POLICY_NOONE,
+        'authorPHID' => $import->getAuthorPHID(),
+        'canCDN' => true,
+      ));
+
+    $import->newLogMessage(
+      PhabricatorCalendarImportFetchLogType::LOGTYPE,
+      array(
+        'file.phid' => $file->getPHID(),
+      ));
+
+    $data = $file->loadFileData();
+
+    return $this->importICSData($viewer, $import, $data);
+  }
+
+  public function canDisable(
+    PhabricatorUser $viewer,
+    PhabricatorCalendarImport $import) {
+    return true;
+  }
+
+}
diff --git a/src/applications/calendar/importlog/PhabricatorCalendarImportICSLogType.php b/src/applications/calendar/importlog/PhabricatorCalendarImportFetchLogType.php
copy from src/applications/calendar/importlog/PhabricatorCalendarImportICSLogType.php
copy to src/applications/calendar/importlog/PhabricatorCalendarImportFetchLogType.php
--- a/src/applications/calendar/importlog/PhabricatorCalendarImportICSLogType.php
+++ b/src/applications/calendar/importlog/PhabricatorCalendarImportFetchLogType.php
@@ -1,36 +1,33 @@
 <?php
 
-final class PhabricatorCalendarImportICSLogType
+final class PhabricatorCalendarImportFetchLogType
   extends PhabricatorCalendarImportLogType {
 
-  const LOGTYPE = 'ics';
+  const LOGTYPE = 'fetch';
 
   public function getDisplayType(
     PhabricatorUser $viewer,
     PhabricatorCalendarImportLog $log) {
-    return pht('ICS Parse Error');
+    return pht('Fetched Calendar');
   }
 
   public function getDisplayDescription(
     PhabricatorUser $viewer,
     PhabricatorCalendarImportLog $log) {
-    return pht(
-      'Failed to parse ICS file ("%s"): %s',
-      $log->getParameter('ics.code'),
-      $log->getParameter('ics.message'));
-  }
 
+    return $viewer->renderHandle($log->getParameter('file.phid'));
+  }
 
   public function getDisplayIcon(
     PhabricatorUser $viewer,
     PhabricatorCalendarImportLog $log) {
-    return 'fa-file';
+    return 'fa-download';
   }
 
   public function getDisplayColor(
     PhabricatorUser $viewer,
     PhabricatorCalendarImportLog $log) {
-    return 'red';
+    return 'green';
   }
 
 }
diff --git a/src/applications/calendar/importlog/PhabricatorCalendarImportICSLogType.php b/src/applications/calendar/importlog/PhabricatorCalendarImportICSLogType.php
--- a/src/applications/calendar/importlog/PhabricatorCalendarImportICSLogType.php
+++ b/src/applications/calendar/importlog/PhabricatorCalendarImportICSLogType.php
@@ -15,7 +15,7 @@
     PhabricatorUser $viewer,
     PhabricatorCalendarImportLog $log) {
     return pht(
-      'Failed to parse ICS file ("%s"): %s',
+      'Failed to parse ICS data ("%s"): %s',
       $log->getParameter('ics.code'),
       $log->getParameter('ics.message'));
   }
diff --git a/src/applications/calendar/xaction/PhabricatorCalendarImportICSFileTransaction.php b/src/applications/calendar/xaction/PhabricatorCalendarImportICSFileTransaction.php
--- a/src/applications/calendar/xaction/PhabricatorCalendarImportICSFileTransaction.php
+++ b/src/applications/calendar/xaction/PhabricatorCalendarImportICSFileTransaction.php
@@ -34,7 +34,7 @@
     $viewer = $this->getActor();
     $errors = array();
 
-    $ics_type = PhabricatorCalendarICSImportEngine::ENGINETYPE;
+    $ics_type = PhabricatorCalendarICSFileImportEngine::ENGINETYPE;
     $import_type = $object->getEngine()->getImportEngineType();
     if ($import_type != $ics_type) {
       if (!$xactions) {
diff --git a/src/applications/calendar/xaction/PhabricatorCalendarImportICSURITransaction.php b/src/applications/calendar/xaction/PhabricatorCalendarImportICSURITransaction.php
new file mode 100644
--- /dev/null
+++ b/src/applications/calendar/xaction/PhabricatorCalendarImportICSURITransaction.php
@@ -0,0 +1,73 @@
+<?php
+
+final class PhabricatorCalendarImportICSURITransaction
+  extends PhabricatorCalendarImportTransactionType {
+
+  const TRANSACTIONTYPE = 'calendar.import.ics.uri';
+  const PARAMKEY_URI = 'ics.uri';
+
+  public function generateOldValue($object) {
+    return $object->getParameter(self::PARAMKEY_URI);
+  }
+
+  public function applyInternalEffects($object, $value) {
+    $object->setParameter(self::PARAMKEY_URI, $value);
+  }
+
+  public function getTitle() {
+    // NOTE: This transaction intentionally does not disclose the actual
+    // URI.
+    return pht(
+      '%s updated the import URI.',
+      $this->renderAuthor());
+  }
+
+  public function validateTransactions($object, array $xactions) {
+    $viewer = $this->getActor();
+    $errors = array();
+
+    $ics_type = PhabricatorCalendarICSURIImportEngine::ENGINETYPE;
+    $import_type = $object->getEngine()->getImportEngineType();
+    if ($import_type != $ics_type) {
+      if (!$xactions) {
+        return $errors;
+      }
+
+      $errors[] = $this->newInvalidError(
+        pht(
+          'You can not attach an ICS URI to an import type other than '.
+          'an ICS URI import (type is "%s").',
+          $import_type));
+
+      return $errors;
+    }
+
+    $new_value = $object->getParameter(self::PARAMKEY_URI);
+    foreach ($xactions as $xaction) {
+      $new_value = $xaction->getNewValue();
+      if (!strlen($new_value)) {
+        continue;
+      }
+
+      try {
+        PhabricatorEnv::requireValidRemoteURIForFetch(
+          $new_value,
+          array(
+            'http',
+            'https',
+          ));
+      } catch (Exception $ex) {
+        $errors[] = $this->newInvalidError(
+          $ex->getMessage(),
+          $xaction);
+      }
+    }
+
+    if (!strlen($new_value)) {
+      $errors[] = $this->newRequiredError(
+        pht('You must select an ".ics" URI to import.'));
+    }
+
+    return $errors;
+  }
+}