April 14^th, 2025

World Quantum Day is an international event celebrated on April 14 every year. It aims at promoting the public awareness and understanding of quantum science and quantum technology around the world.

World Quantum Day started on 14 April 2021 as an initiative by an international group of scientists. The initiative was joined by engineers, educators, science communicators, organizations and others to celebrate the first World Quantum day on 14 April 2022. April 14 was chosen because “4.14” represents the rounded first 3 digits of the Plancks constant: 4.14×10−15 eV·s.

On June 7^th 2024, the United Nations has officially recognised the importance and potential of quantum technologies after a General Assembly meeting declared 2025 as the International Year of Quantum Science and Technology (IYQ) – a global collaboration that aims to strengthen national capacities in the basic sciences and science education.

The year-long initiative will celebrate the impacts of quantum science on technology, culture, and our understanding of the natural world while marking a century since Erwin Schrödinger developed wave mechanics and Werner Heisenberg, Max Born, and Pascual Jordan developed matrix mechanics.