To receive reminder emails two days before registration opens or closes for a certain event, you can use the Turn on Alert feature. Here are the steps:
 
1.    Login to ACTIVE.com
2.    Search for desired event
3.    Click Event name
4.    Click User-added imagebelow the event name banner
Note: Once clicked, you will be able to receive the reminder emails and the icon will become User-added imagewhich you can click to turn it off.
 
User-added image