Don’t have a project yet for this, but your spurring made me think. 
Why not create a project for everyone to play around with?
Feel free to duplicate or mess with it in read-ony mode.
http://time-based-reveal.webflow.io
So the challenge is to use a script make each alert only show up on its day of the week. For instance today is wednesday so the script would reveal the alert div for today .alert.wednesday. It would then look like this.
Any help is greatly appreciated and I’ll keep this project around for others to learn from when we’re done.