The International Day of Parliamentarism, also known as World Parliament Day, is celebrated every year on 30 June.

It was established in 2018 through a United Nations General Assembly Resolution and the day also marks the anniversary of the Inter-Parliamentary Union’s (IPU) establishment. 2024 also marks the IPU’s 135th anniversary since its foundation on 30 June 1889.

To mark World Parliament Day 2024, the Commonwealth Parliamentary Association supported the IPU’s campaign  to highlight how Commonwealth Parliaments are utilising parliamentary diplomacy.