diff --git a/cron.yaml b/cron.yaml
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+# Copyright 2016 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style
+# license that can be found in the LICENSE file or at
+# https://developers.google.com/open-source/licenses/bsd
+
+# The default timezone for crons in App Engine is UTC.
+# See: https://cloud.google.com/appengine/docs/standard/python/config/cronref#syntax
+# To avoid potential bugs with Daylight Savings Time, please do
+# not use timezones other than UTC.
+
+cron:
+- description: keep the databases loaded
+  url: /p/chromium/issues/list
+  schedule: every 30 minutes synchronized
+- description: consolidate old invalidation rows
+  url: /_cron/ramCacheConsolidate
+  schedule: every 6 hours synchronized
+- description: index issues that were modified in big batches
+  url: /_cron/reindexQueue
+  schedule: every 1 minutes synchronized
+- description: get rid of doomed and deletable projects
+  url: /_cron/reap
+  schedule: every 24 hours synchronized
+- description: send ts_mon metrics
+  url: /internal/cron/ts_mon/send
+  schedule: every 1 minutes
+- description: export spam model training examples
+  url: /_cron/spamDataExport
+  schedule: every day 09:00
+- description: fetch api clients from luci-config
+  url: /_cron/loadApiClientConfigs
+  schedule: every 30 minutes synchronized
+- description: deletes old visited hotlists
+  url: /_cron/trimVisitedPages
+  schedule: every monday 01:00
+- description: ping all issues with date fields that arrived
+  url: /_cron/dateAction
+  schedule: every day 12:00
+- description: retrain spam model with GCS training data
+  url: /_cron/spamTraining
+  schedule: every day 10:00
+- description: export component model training examples
+  url: /_cron/componentDataExport
+  schedule: every mon 9:00
+- description: sync monorail's user lists with wipeout-lite
+  url: /_cron/wipeoutSync
+  schedule: every day 09:00