About:

1. National Anti-Terrorism Day is observed on 21 May every year in India.
2. The day aims to raise awareness about the anti-social act of terrorism and its impact on human suffering and lives.
3. The day marks the death anniversary of the Former Prime Minister of India. The day also aims to spread the message of peace and humanity and to promote unity among people. 
4. Due to the COVID-19 pandemic, the day has been decided to be observed with precautions. Ministry of Home Affairs (MHA) has advised that 'Anti-Terrorism Pledge' may be taken solemnly by the Officials in their rooms/offices itself.

Background:

1. The seventh Prime Minister of India Rajiv Gandhi was assassinated on 21 May 1991. He was killed in Tamil Nadu in a campaign by the terrorist.
2. Following this tragedy, under the V.P. Singh government, the Centre has decided to observe 21 May as Anti Terrorism Day.