• Astronomical year numbering - Astronomical year numbering is based on AD/CE year numbering, but follows normal decimal integer numbering more strictly. Thus, it has a year 0; the years before that are designated with negative numbers and the years after that are designated with positive numbers.
  • Century - A century is a period of 100 years. Centuries are numbered ordinally in English and many other languages. For example, "the 17th century" refers to the years from 1601 to 1700.
  • Decade - A decade is a period of ten years. The word is derived from the, which means a group of ten. Other words for spans of years also come from Latin:, triennium, quadrennium, lustrum, century, millennium.
  • Millennium - A millennium is a period equal to 1000 years, also called kiloyears. It derives from the Latin mille, thousand, and annus, year. It is often, but not always, related to a particular dating system.
  • ISO 8601: standard for representation of dates and times.
  • Epoch (reference date) - In the fields of chronology and periodization, an epoch is an instant in time chosen as the origin of a particular era. The "epoch" then serves as a reference point from which time is measured.
  • Orders of magnitude (time)
  • Solar calendars
  • Units of time
  • Years
  • Calendars

"Year" in the news

People discussing "Year"

Year videos

"Year" images