World Quantum Day
April 14
World Quantum Day 2026
World Quatum Day (WQD) is celebrated this year on Tuesday, April 14, 2026. This annual, international celebration, is held on April 14th (4/14) to represent the rounded first digits of Planck’s constant, a fundamental value in this quantum mechanics formula ( 4.14 * 10^-15 eV•S).
