Do any other countries have a national holiday on September 1st (which in the US is Labor day)?

Question

If so, what is that holiday named and what is it's significance?

Answer 1

It's Labour Day in Canada as well.  

"Labour Day is celebrated on the first Monday of September. It is a statutory holiday throughout Canada.

The Canadian labour movement can justly claim the title of originator of Labour Day. Peter J. McGuire, one of the founders of the American Federation of Labour has traditionally been known as the 'Father of Labour Day'. Historical evidence indicates that McGuire obtained his idea for the establishment of an annual demonstration and public holiday from the Canadian trade unionist.

Earliest records show that the Toronto Trades Assembly, perhaps the original central labour body in Canada, organized the first North American 'workingman's demonstration' of any significance for April 15,1872. The beribboned parade marched smartly in martial tread accompanied by four bands. About 10,000 Torontonians turned out to see the parade and listen to the speeches calling for abolition of the law which decreed that trade unions were criminal conspiracies in restraint of trade.

The freedom of 24 imprisoned leaders of the Toronto Typographical Union, on strike to secure the nine-hour working day, was the immediate purpose of the parade, on what was then Thanksgiving Day. It was still a crime to be a member of a union in Canada although the law of criminal conspiracy in restraint of trade had been repealed by the United Kingdom parliament in 1871."