There are 20 years in a score. The word "score" can be used to mean a set or group of any 20 items, not just years.Know More
The English word "score" is likely derived from an Old Norse word, "skora," which was used to mean a notch or a tally in addition to meaning the number 20.
One of the most well-known uses of the word "score" to mean a group of 20 years is in the Gettysburg Address, in which Abraham Lincoln said, "Four score and seven years ago our fathers brought forth on this continent, a new nation, conceived in Liberty, and dedicated to the proposition that all men are created equal."
Martin Luther King, Jr. echoed this in the first line of his "I Have a Dream" speech: "Five score years ago, a great American, in whose symbolic shadow we stand signed the Emancipation Proclamation."Learn more about Time & Calendars
The transit of Venus happens every 100 years. The last one was in June 2012, and the next one occurs in 2117. This happens as Venus directly passes between the Earth and the Sun. This once-in-a-lifetime astronomical alignment has been witnessed eight times since the telescope was invented. These eye-witness-accounts occurred in 1631, 1639, 1761, 1769, 1874, 1882 and 2004, and the last was in June 2012.Full Answer >
An era is not a defined number of years. Rather, it is a period of time marked by certain characteristics, such as historical events. In geology, an era is composed of periods.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 >
Unlike the Gregorian calendar, which counts years infinitely, the traditional Chinese calendar is lunisolar and rotates on a 60-year cycle. This means that the years on a Chinese calendar don't ascend in chronological order, and instead its years are named with words rather than numbers. The year names are based on a combination of one of 10 prefixes, or stems, and one of 12 suffixes, or branches.Full Answer >