Is there a way to schedule a PopUp?

Hello, I've installed your PopUp Pro plugin and I really like the triggers and level of customization you've built in. However, I need to be able to schedule popups to appear only on certain days, and this doesn't seem to be supported nor can I figure out a way to hack it with the available triggers. Is there any way to schedule a popup to only appear within a given date range? I'm comfortable with development and could mix in a custom function to extend functionality if doable.

Your feedback is appreciated, thanks..... Paul