--- title: World Metrology Day slug: world-metrology-day-a6333 url: /detay/world-metrology-day-a6333 type: article language: English entity: primary: World Metrology Day type: article categories: - name: General Knowledge slug: genel-kultur url: /kategori/genel-kultur - name: History slug: tarih url: /kategori/tarih tags: - World Metrology Day - UNESCO author: Nursena Güller created_at: 2025-10-26T01:46:33.166626+03:00 updated_at: 2025-11-06T13:27:52.557546+03:00 --- # World Metrology Day ## KURE Information Cards ![metroloji kart.png](https://cdn.t3pedia.org/media/uploads/2025/10/25/5fCwbdoUi92QVpg2rzWpiTreTTQSueNK.png) *World Metrology Day (Generated by Artificial Intelligence.)* | Field | Value | |-------|-------| | Date(s)(Text) | May 20 | | Legal Basis | UNESCO 42nd General Conference (42 C/22),International Committee for Weights and Measures (CIPM) Resolution (1999),Metre Convention (1875) | ## Article Content **World Metrology Day** is an international observance celebrated annually on **May 20**. The day highlights the role of measurement science (metrology) in science, technology, economics and societal applications. Metrology ensures the accuracy and reliability of measurements, providing order and consistency across fields ranging from scientific research to international trade, environmental monitoring and public health. The aim of [World Metrology Day](/en/detay/dunya-metroloji-gunu-7355e/llms.txt) is to draw attention to the importance of metrology for societies and global processes and to raise awareness. ### **History** The origins of World Metrology Day trace back to the **Metre Convention**, signed in **Paris on May 20, 1875**. This convention established a foundation for internationally comparable measurements and led to the creation of the **International Bureau of Weights and Measures (BIPM)**. Over time, the [Metre Convention](/en/detay/meteorology-c2844/llms.txt) facilitated the development and global adoption of the **International System of Units (SI)**. World Metrology Day was officially proclaimed in **1999** by the **International Committee for Weights and Measures (CIPM)** to commemorate the signing of the Metre Convention. In **2023**, [UNESCO](/en/detay/united-nations-educational-scientific-and-cultural/llms.txt)’s **42nd General Conference (42 C/22)** included World Metrology Day among UNESCO International Days. The conference decision emphasized the role of metrology in sustainable development, energy and public health and encouraged member states, civil society organizations and academic institutions to celebrate the day annually. ### **Global Celebrations and Activities** World Metrology Day is celebrated worldwide by national metrology institutes, legal metrology authorities, regional organizations and international scientific networks. Activities include symposiums, panel sessions, laboratory demonstrations and educational programs. The celebrations emphasize the importance of accurate measurements for economic progress, technological applications and scientific advancement. The **2025 World Metrology Day** was celebrated with the theme **“150 Years of the Metre Convention: Science, Innovation, and Global Impact”** at a symposium held at the **UNESCO Headquarters in Paris**. Government representatives, scientists, industry experts and international organizations attended the event. Discussions focused on the significance of harmonized measurement standards for technological progress, economic growth and sustainable development. ### **Importance of Metrology** Metrology provides the foundation for scientific, technological and economic processes by ensuring measurement accuracy and comparability. Measurement accuracy enables comparability and reproducibility of experimental results. In industry and trade, product quality, safety and fair competition in international markets rely on measurement standards. In health, accurate measurements are critical for drug dosages, calibration of medical devices and laboratory testing. Environmental monitoring, such as climate change data, depends on precise metrological measurements. In transportation and construction, structural safety, engineering calculations and material control require reliable measurement systems. Metrology ensures the continuity and universality of the metric system, allowing international production, design and analysis processes to operate under consistent standards. ### **UNESCO’s Activities in Metrology** UNESCO associates metrology with scientific advancement, technological development, cultural heritage preservation, and sustainable development. The organization supports the role of measurement science in research, innovation and economic development. Metrological instruments provide data for monitoring historical structures, assessing environmental impacts and implementing preservation processes. UNESCO’s **Recommendation on Open Science** encourages access to measurement data and promotes international information sharing. The **Fundamental Sciences Programme** aims to strengthen education, research and international coordination in the field of metrology. ### **World Metrology Day in Türkiye** In Türkiye, activities are conducted by the **TÜBİTAK National Metrology Institute (UME)**. The **2024 World Metrology Day poster** was designed by [TÜBİTAK](/en/detay/tubitak-86565/llms.txt) UME in collaboration with the **European Association of National Metrology Institutes (EURAMET)**. The poster, prepared with a sustainability theme, has been used in international events. ## Academic Sources and References 1. TÜBİTAK Ulusal Metroloji Enstitüsü (UME). “2024 Dünya Metroloji Günü Posterinde TÜBİTAK UME İmzası.” TÜBİTAK UME. Accessed October 24, 2025. https://www.ume.tubitak.gov.tr/2024-dunya-metroloji-gunu-posterinde-tubitak-ume-imzasi/UNESCO. “Message from Ms Audrey Azoulay, Director-General of UNESCO, on the Occasion of World Metrology Day, 20 May 2025.” UNESCO Digital Library. Accessed October 24, 2025. https://unesdoc.unesco.org/ark:/48223/pf0000393759?posInSet=6&queryId=N-a6dd0f2a-fc29-4a38-a204-8dcdba57115aUNESCO. “World Day for Metrology.” UNESCO. Accessed October 24, 2025. https://www.unesco.org/en/days/metrologyUNESCO. “World Metrology Day 2025.” UNESCO. Accessed October 24, 2025. https://www.unesco.org/en/articles/world-metrology-day-2025UNESCO Türkiye Millî Komisyonu. “Bilim Komisyonu Raporu 42C.” UNESCO Türkiye Millî Komisyonu. Accessed October 24, 2025. https://www.unesco.org.tr/Content\_Files/Content/Do%C4%9Fa%20Bilimleri%20Komisyonu%20Raporu.pdfUNESCO Türkiye Millî Komisyonu. “Duyuru.” UNESCO Türkiye Millî Komisyonu. Accessed October 24, 2025. https://www.unesco.org.tr/Home/AnnouncementDetail/6491