+1

You can also set up Cloud Scheduler to push to Pub/Sub, which can trigger your function. This is helpful if you don't want your function to be available via a public HTTPS endpoint.

Note to Firebase team: I use exactly this (a Cloud Scheduler job that pushes to a pub/sub topic, and then set a Firebase function that runs on a topic trigger) to schedule functions, but would be really nice if I could just create a triggered cron function like this:

functions.cron.schedule('0 0 * * *').onSchedule(...)

or something like that. Even if it behind the scenes it just did exactly what I'm doing manually now, I see so many questions about cron-triggered functions that it would save a ton of people time searching for what the best route is to take.