International Day of Light 2026

The International Day of Light is observed on May 16, 2026. Initiated by UNESCO, the day annually commemorates the first successful use of a laser on this date in 1960 by physicist Theodore Maiman. The observance highlights the importance of light-based technologies in science, education, and sustainable development.

Activities focus on raising awareness of light pollution, energy efficiency, and innovations such as solar power, emphasizing how light advances society and addresses global challenges. By the way, did anyone leave the light in the kitchen on again?

More dates:

• International Day of Light on May 16, 2027
• International Day of Light on May 16, 2028
• International Day of Light on May 16, 2029