How to confirm a user is at least 18 years old with Gravity Forms Enter Date of Birth(Required)You must be at least 18 years old to register. MM slash DD slash YYYY User's AgeThis field is visible for demonstration purposes only. You can hide this field via the gf_invisible class.EmailThis field is for validation purposes and should be left unchanged. This demo is powered by Gravity Forms v2.9.13. Report an issue with demo