A rolling year is a period of 12 months that begins and ends on a set day. Rolling years are sometimes used by government agencies and corporations.Continue Reading
Companies use rolling years to mark an employee's start date anniversary to calculate when he or she is eligible for health benefits and to calculate benefits, such as family medical leave. In the business world, rolling years are calculated in the same way for all employees, no matter a person's rank in a company.
A rolling year may not coincide with a fiscal year or a calendar year because their start dates may be different. Calendar years often include leap years, and fiscal years are identical for around 65 percent of publicly traded companies around the world.Learn more about Time & Calendars
Although astronomers and geologists use the word "eon" to mean 1 billion years, it is more commonly used to refer to any long, indefinite period of time. Like the words "age," "epoch" and "era," it does not refer to a set number of years.Full Answer >
A decade is a period of 10 years. The word "decade" originates from the Greek word "dekas," which means a group of 10. The word "decade" began to be used in English to mean a period of 10 years in 1590.Full Answer >
The evening is generally understood to encompass the hours from before sunset to just after nightfall or bedtime, a period of time that ranges from roughly 4 p.m. to 10 p.m. In general, the term "evening" is used to describe a vague period of time that is somewhere between the afternoon and night.Full Answer >
Ancient Egypt refers to a long period of time in history, but there is evidence that Egyptian society once used a lunar calendar before switching to a solar 365-day calendar. They eventually used the stars to predict important agricultural events like the flooding of the Nile River. Their older lunar calendar did not take the Nile flood into account, and it was eventually replaced by one that helped predict the river's flooding.Full Answer >