International Day Against Nuclear Tests - 2021

CTBTO head Robert Floyd at the Semipalatinsk Test Site
Take a virtual tour of the Semipalatinsk Test Site

The International Day Against Nuclear Tests is marked annually on 29 August to remember the devastating consequences of nuclear tests and express support for the Comprehensive Nuclear-Test-Ban Treaty (CTBT) as a key pillar of the international non-proliferation and disarmament framework.

Established in 2009 by the General Assembly, through a resolution initiated by Kazakhstan, it commemorates both the anniversary of Kazakhstan’s closure of the former Soviet Semipalatinsk nuclear test site in 1991, and the date the first Soviet nuclear test was conducted there in 1949.


IDANT 2021 – High-level calls at UNGA for CTBT entry into force

IDANT 2021 – Statement by CTBTO Executive Secretary Robert Floyd to High-Level Meeting of the UNGA (PDF)

IDANT 2021 - Watch the UN General Assembly High-level Plenary Session (UN Web TV)

IDANT 2021 – Watch ES Floyd’s address to UNGA

IDANT 2021 – CTBTO head Floyd visits Kazakhstan

IDANT 2021 – Joint Statement by Foreign Minister of Kazakhstan and CTBTO Executive Secretary



Additional resources:

Read more on IDANT as a UN international day.

Take a virtual tour at the Semipalatinsk Test site.

Read about IDANT 2020.