New countdown

Menu

Report a problem

We send the page you’re on and your browser’s name with it. Nothing else.

UNESCO international day

World Metrology Day is coming up.

Thursday, 20 May 2027

Print a sleep chartFull screenScreensaver

A week before, the day before and on the day. No account, nothing else.

Watch party

Count down with everyone else on this page right now.

About World Metrology Day

World Metrology Day is marked on 20 May each year. It’s one of UNESCO’s international days listed on Wikipedia.

In 2027 it falls on a Thursday; in 2028 it’s on Saturday 20 May, and in 2029 on Sunday 20 May. Also in May 2027: World Bee Day (20 May), Teachers’ Day (Puerto Rico) (20 May) and Global Accessibility Awareness Day (20 May). From this page you can add it to your calendar, get an email before it, share the countdown, or show it full screen.

How we work out the date
It’s on 20 May every year.
Sources

Page updated 5 November 2026. Report a wrong date

Dates

YearDate
2027Thursday, 20 May
2028Saturday, 20 May
2029Sunday, 20 May
2030Monday, 20 May
2031Tuesday, 20 May
2032Thursday, 20 May
2033Friday, 20 May
2034Saturday, 20 May
2035Sunday, 20 May
2036Tuesday, 20 May

More like this

See all events

Share World Metrology Day