Pluto Demoted Day 2009

Pluto Demoted Day marks the decision that classified Pluto as a dwarf planet.

Frequently asked questions

When is Pluto Demoted Day 2009?

Pluto Demoted Day 2009 is on Monday, 24 August 2009.

What day of the week is Pluto Demoted Day 2009?

It falls on Monday.

How is Pluto Demoted Day calculated?

This event is observed every year on 24 August.