Drupal 7: How to filter a view for users less than 30 days old?

1. Add a filter on User: Created Date
2. Set Operator to "Is greater than or equal to"
3. Set "Value Type" to 'An offset from the current time such as "+1 day" or "-2 hours and 30 minutes"'
4. For Value enter "-30 days"
5. That's it!