The start and end date option is available to present promotions for website visitors; this is a great way to create promotions prior to a special event or holiday and automatically shut them off when the special ends.
1. Log into your account. Once in the dashboard, navigate to "Promotions".
2. Once in the Promotions page, click on the Paintbrush icon next to the promotion you'd like to edit.
3. Once there, you'll find an area on the left that is called basic settings; there you will find date and time.
4. Remember: log in after the promotion expires to ensure you will have an overlay on your site