World Metrology Day 2025

World Metrology Day marks the Metre Convention and the role of accurate measurement in society.

Frequently asked questions

When is World Metrology Day 2025?

World Metrology Day 2025 is on Tuesday, 20 May 2025.

What day of the week is World Metrology Day 2025?

It falls on Tuesday.

How is World Metrology Day calculated?

This event is observed every year on 20 May.