Scheduling mqtt post

I will have a file (text, excel... doesen't matter). On each line of this file there is date, time, and the code for a function. What i need is to execute the function written in my file at the specified time and date in node.js on a server.

Since the function is actually a post on a mqtt broker, I'm actualy looking for any method that could do.

Could anyone point me to the right direction?

Thank you