World Metrology Day observed on May 20 with the theme Metrology: Building Trust in Policy Making

Key facts

• World Metrology Day was commemorated on May 20, 2026, marking the 151st anniversary of the historic Metre Convention signed in Paris in 1875.
• The theme for World Metrology Day 2026 is Metrology: Building Trust in Policy Making, focusing on the role of accurate measurement in governance and consumer protection.
• India has become the 13th country authorised to issue International Organization of Legal Metrology (OIML) pattern approval certificates and will host the 61st Meeting of the International Committee of Legal Metrology in New Delhi in October 2026.
• The National Physical Laboratory (NPL) and Indian Space Research Organisation (ISRO) are jointly implementing the One Nation, One Time initiative to disseminate Indian Standard Time (IST).
• The Union Government launched the e-Maap portal and issued 40 Government Approved Test Centre (GATC) certificates to private entities to expand measurement infrastructure.