One common use case of Mogul is to remember Birthdays and other important dates about people. WIth Mogul's custom fields feature, we can do exactly that!
First, add a custom field of type "Important Date" in the Custom Field Editor and name it Birthday.
You'll notice that for Important Dates, you have the ability to turn on notifications for the event. If you have email notifications enabled, you'll receive notifications via email. If you have iOS notifications, you'll receive those as well.
On the day of events, you'll see a new "Important Events" section in the Reminders page that shows you the important events for that day.