National Jamboree, at Fort AP Hill
World Scout Jamboree, location varies (international)
Every 100 years is called a century, made up of 10 decades.
An event that occurs every thirty years is called a "triennial" event. However, this term can be misleading since "triennial" technically refers to something happening every three years. For events specifically occurring every thirty years, the term "tricenary" can be used, although it is less common.
An event occurring every two years is referred to as a biennial event. This pattern indicates that the event happens once every two years.
An event occurring every ten years is called a "decennial" event. The term "decade" refers to a period of ten years, and thus, "decennial" signifies something that takes place once within that time frame. Examples include the decennial census conducted in various countries.
those are called the Olympics
They used to be called Junior Girl Scouts. With changes in the past few years, they are now called Girl Scout Juniors and are girls in grades 4 and 5 who are members of Girl Scouts of the U.S.A.
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.
An event that occurs once every three years.
Large gatherings of many scouting troops are called camporees or jamborees. A troop is a collection of one or more patrols. A patrol is group of approximately eight scouts. Troops are further organized into administrative groups called councils.
A triennial event happens every three years.
This event is known as a Great Conjunction, where the orbits of Jupiter and Saturn align roughly every 20 years. However, a planetary alignment involving all the planets is a rare occurrence and may not happen exactly every 100 years.
bidecadal