To build an Age Calculator with React Hooks in Next.js, first, you need to set up the development environment using Create React App.Add Tailwind CSS for styling and import the useState hook from React to manage the application's state.Create a function called calculateAge that takes the birth date as an argument and returns the calculated age.Design a basic user interface with an input field for birth date, a button to trigger the age calculation, and a display area for the calculated age.