How to wait for a certain time with os, but on any day

Hello!
I want to run an event at a certain time, but at any day. For example, at 15:00, a message Is printed to the console, or a part goes invisible, etc.
I’ve tried using os.time, but it requires an exact date, I just want it to be at an exact time.
I’ve just started learning about the os feature, so I don’t know much about it.

I’d appreciate any help or resources, thank you! (:

See this post, it should help. You can use os.date, and pass in the relevant specifiers.