I have a client doing workshops. They require a deposit weeks in advance of the workshop.

In the CMS I created a date field called "Deposit Due Date." I'm wanting to show a button labeled "SAVE MY SPOT (Deposit)" which links to an external app EventsFrame which then takes a registration deposit.

If the "Deposit Due Date" is >= to today, I'd like to show the button. If < then today, I'd like to not show it. 

Of course, this could be useful for may other implementations.