Overview

• World Metrology Day is observed annually on May 20 to commemorate the signing of the Metre Convention in 1875, which established the metric system and international measurement standards.
• The 2025 celebration marks the 150th anniversary of the Metre Convention, underscoring its foundational role in global cooperation and scientific advancement.
• The theme for 2025, 'Measurements for all times, for all people,' highlights the universal and timeless importance of accurate and reliable measurements in innovation, trade, health, and environmental protection.
• Events including seminars, technical workshops, exhibitions, and awareness campaigns are being held worldwide to educate and engage the public on the critical role of metrology.
• The observance is jointly coordinated by major international organizations like BIPM, OIML, CIPM, and UNESCO, reflecting the collaborative effort to advance measurement science globally.