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An event that occurs every 100 years is called a "centennial" event. The term "century" can also be used to describe this time span, and events that take place at this interval are often celebrated or noted for their significance. In some contexts, such as anniversaries, the term "centenary" is also appropriate.
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What would call something that happens every three years?
A triennial event happens every three years.
What do you call something that happens every week eg something that happens every year is annual?
weekly
What do you call something that happens twice every hundred years?
Georgia winning a national championship in football.
What do you call it when something happens every year?
Annual.
What do you call something that is every 1000 years?
A millenium.:)
What do you call an event that happens every ten years?
I think you are asking about a census.
How you call something that happend every 5 years?
an idiotical freak
What do you call an event that happens every other year?
An event that happens every other year is called a "biennial" event. This term is derived from the Latin "biennium," meaning "two years." Such events can include things like festivals, conferences, or exhibitions that occur once every two years.
What do you call something that happens every day?
Normal, typical, usual, ordinary, common, commonplace, routine, customary, and a daily occurrence.
What do you call something that happens three times a year?
triannual
What do you call something which happens once a year?
An annual event
What do you call every thirty years?
Month
