[Xeago]

Given that you mention Luigi, have a look at Styx. Currently in use at Spotify as a complement to the underlying job processing frameworks.

https://github.com/spotify/styx

[pmchorus]

Looks like it only support cron expressions and no timezones. Moreoever, I don't plan to deploy a Kubernetes cluster in the short term (looks like to be a huge work to have something ready for production). I'm primarily looking for something I can install on the existing systems.