GAE Cron for Cloud PubSub
The Google App Engine Application which publishes 4 publications to 4 topics, every mintes, every hours, every days and every weeks.
Using this service for scheduling and Google Cloud Pub/Sub for distributed messaging, you can build an application to reliably schedule tasks which can trigger Google Cloud Functions.
projects/:project_id/topics/daily-tick projects/:project_id/topics/hourly-tick projects/:project_id/topics/minutely-tick projects/:project_id/topics/weekly-tick
gcloud app deploy app.yaml \cron.yaml # check gcloud app browse