Australia

We still celebrate it every year in March.

What happened in March? I don't know as much about other states' Labour Day history.

I’d be in favour of us changing the date to one that relates to our accomplishment as well.

I think that's missing the point of International Workers' Day - it's not just about our national accomplishments like Labour Day. Our labour movement has had effects on other countries (e.g. our pioneering contribution to the eight-hour day struggle, green bans, the Dalfram dispute re: Imperial Japan, black bans of the Dutch Black Armada trying to colonise Indonesia, wharfies in general), and other countries on our struggles (again, maritime work in general is an example, where worker unions and members from different countries regularly interact and interrelate. An interesting specific example was the solidarity actions with Australian waterside workers in 1998, including parliamentary and harbour actions in Spain, anti-scab actions in New Zealand, and the picketing of Australian embassies in the Phillipines, Pakistan, Sri Lanka, and the USA^[1]^.

We live in a global capitalist economy, our work often relies on the products and demand from other countries, and therefore an international perspective of labour is useful for any of us who want the best outcomes for our worker class. And so, while it's obviously not the most important thing in the world, I believe celebrating an explicitly international labour day is constructive and beneficial even from a local perspective.