This tutorial explains how to set up a newsletter that sends daily updates, based on input from a Formidable form (using the WordPress plugin Formidable).
In this specific example, the input is a "calendar" form, where users can add events to a calendar. The newsletter is posted every afternoon to announce events of the next day (it gets only sent when there is content for the next day).
What we need:
- Formidable form with date input: build a form that contains a date field (datepicker).
- Custom WordPress shortcode