A national day of remembrance in Australia and New Zealand that broadly commemorates all Australians and New Zealanders "who served and died in all wars, conflicts, and peacekeeping operations" and "the contribution and suffering of all those who have served" https://www.awm.gov.au/index.php/commemoration/anzac-day/traditions
https://www.alia.org.au/nss book for 2022 is Family Tree written by Josh Pyke and illustrated by Ronojoy Ghosh
This day gives people the chance to come together and share the steps towards healing for the Stolen Generations, their families and communities. https://www.reconciliation.org.au/national-sorry-day-an-important-part-of-healing/
National Reconciliation Week is a time for all Australians to learn about our shared histories, cultures, and achievements, and to explore how each of us can contribute to achieving reconciliation in Australia - https://www.reconciliation.org.au/national-reconciliation-week/
Mabo Day, Torres Strait Island commemorates the courageous efforts of Eddie Koiki Mabo to give ‘legitimacy’ for the British and later colonial and Australia governments to allow the dispossession of all Indigenous peoples of their land and access to it. http://www.aboriginalheritage.org/news/2013/mabo-day/
World Environment Day - encouraging worldwide awareness and action for the protection of our environment. http://worldenvironmentday.global/en