A Twilio Voice app was built to ring in the New Year, allowing users to leave messages for the world to hear at midnight. The app uses Twilio's REST API to handle incoming calls, gather recordings, and initiate massive outbound calls to play back the collected messages. To use the app, users call a specific number, record their New Year's Eve wishes, and provide a URL of their recording. The app then gathers the recordings, plays them back at midnight, and enables users to include friends in the experience by inputting their phone numbers. The project aims to create a social and connected experience for users worldwide on New Year's Eve.