Eh? Which country do you mean, different countries have different dates. New Zealand for example has Labour Day which was enacted considerably prior to May Day memorials in other countries.
But for the US, 1891.
An anniversaryanniversary: the annual celebration of an event on that day of a previous year
Annual
one. annual means once a year.
Yes
Annual is a year: e.g Annual salary. So roughly 365 days.
1891
1789
Once a year is called an annual event.
Something that happens once a year.
An annual event
The Super Bowl is an annual event because it occurs once a year, at the end of each NFL season.
Once a year. An annual event only happens once a year, and happens every year.
Once a year
An annual event starts with A and happens once a year.
A full course dinner and drinks should be in an annual dinner event for a company. Often companies include a breakdown of what was accomplished over the past year and what the goals are for the coming year.
It is but an event does not have to be an annual one. For example, a picnic can be considered an event as just about any occasion.
1998