Kushal Das :python: :tor: 🇸🇪 on Nostr: I can have a queue of workers in the background, I am wondering more on the ...

I can have a queue of workers in the background, I am wondering more on the *time/schedule* part of the task. What are common ways people schedule tasks? These tasks will be only once in a day (on a given time changing every time) or once in a 6 hours or so. But a lot of tasks.
Manually I world do cronjobs, but what is a good programatic way?