The 21st of February is International Mother Language Day.

International Mother Language day has been celebrated every year since February 2000 to promote linguistic and cultural diversity and multilingualism.

On International Mother Language Day the UN's Educational, Scientific and Cultural Organization (UNESCO) and UN agencies participate in events that encourage people to maintain their knowledge of their mother language while learning and using more than one language.

Governments and non-governmental organizations may use the day to announce policies to encourage language learning and support.