Set a custom message when your form is not available
Customize the text that visitors see when trying to view your page outside the available dates. You can specify a message that is displayed before the form is available and also after the registration date has passed. Here is how to do it.
Edit a campaign and click on the Basics Tab. Under the Registration Options section, click the text link Show advanced options. You'll see two custom message options.
The first option allows you to specify text before opening date. The second option displays text after the closing date. This text will automatically display for your visitors.