So far, we've seen functions triggered by HTTP requests and functions triggered by events, such as a message being queued and a blob being created, but there's another very useful trigger type, which is simply a timer trigger. With a timer, you can execute your function every minute or hour, once a day, on set hours, and on basically any schedule you can think of (with a minimum interval of a minute). Think of nightly cleanup jobs or weekly reporting.
Timer triggered functions
Using the cron syntax
The syntax that's used for timer triggers is called cron; it's widely used in Unix-like operating systems and it comes from the Greek word for time, chronos. The syntax is often short, convenient, and very difficult...
