ATL Mega Tinkering Day is a nationwide event organized by the Atal Innovation Mission (AIM) under NITI Aayog. It is designed to be one of India's largest school-based innovation movements, bringing together students from thousands of Atal Tinkering Labs (ATLs) across the country. On this day, students from both ATL and non-ATL schools participate in a synchronized, hands-on, Do-It-Yourself (DIY) project challenge. The event's purpose is to ignite curiosity, creativity, and a spirit of problem-solving among young minds by encouraging them to apply scientific and technological concepts to create practical, innovative solutions.