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You can create new Autoresponder email to the everyone who filled the form on specific date.
Click on the Email tab at top, then click on the Create New Email
Choose Autoresponder Email type , on Advanced tab there is a field Send Emails Later. On the Custom date You can send event reminder Email anytime you want. And on Email tab you can give any information you want.
I hope this will help you to create reminder email. If you have additional question please feel free to ask.