International Translation Day, 30th September
The UN website gives background for the date of International Translation Day .
https://www.un.org/en/observances/international-translation-day
Wikipedia has more information;
https://en.wikipedia.org/wiki/International_Translation_Day
The International Federation of Translators has an annual poster competition for ITD
"Finding the words for a world in crisis - Celebrating International Translation Day in 2020
The International Federation of Translators (FIT) proudly announces the WINNER of its annual poster competition commemorating International Translation Day (ITD) each 30 September."
see the poster here: