porting a conversation from this GitHub Issue
Currently, RedwoodJS does not have a built-in cron feature.
Per @rob
If you need something immediately check out https://www.easycron.com/
If you make a custom function likeapi/src/functions/custom.js
and deploy to Netlify, it will be available at/.netlify/functions/custom
and can be called from the internet at large. You can set up a one-time call to that function or a recurring job on easycron and be good to go.