A decade is a period of 10 years. The word is derived via French and Latin which means a group of ten. Decades may describe any ten-year period, such as those of a person's life, or refer to specific groupings of calendar years. 0-to-9 decade, the most widely used method for denominating decades is to group years based on their shared tens digit, from a year ending in a 0 to a year ending in a 9. A rarer approach groups years from the beginning of the AD calendar era to produce successive decades from a year starting in a 1 to a year ending in a 0, with the years 1–10 described as "the 1st decade", years 11–20 "the 2nd decade", and so on.
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Standard Units | |
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Callippic Cycles | {{callippic_cycles}} |
Century | {{century}} |
Days | {{day}} |
Hours | {{hour}} |
Lustres | {{lustre}} |
Millennium | {{millennia}} |
Millisecond | {{millisec}} |
Miniutes | {{min}} |
Moments | {{moment}} |
Month | {{month}} |
Nanoseconds | {{nanosec}} |
Seconds | {{sec}} |
Sothic Cycle | {{sothic_cycles}} |
Weeks | {{week}} |
Year | {{year}} |
Years (Julian) | {{ju_year}} |
Year (Tropical) | {{tr_year}} |