Custom function scheduled to run nightly?

Hi, I have several variables in a module that are populated by custom functions. Right now they are set up to run only when the record is edited, but really I need them to run daily / nightly for each record. It doesn't appear that there's a way to set up a nightly "batch" function in Workflows that triggers nightly, if there is I could use some help?

Otherwise, it sounds like Zoho Creator has the ability to trigger functions on a schedule? I've started coding this in Deluge but I'm hoping there's an easier way, particularly since I've already created the functions in CRM and I'm not sure how to import them into or call them from Creator.

I can send a support request on this, but I'm certain other users will have the same question and would benefit from the answer being in the forums.

Thanks for your help,

Jonathan