## A New DecadeThere is disagreement as to whether the second 10-year decade of this century begins this year, 2020, or next year, 2021. That is, some believe the new decade runs from 2020 through 2029, while others believe the new decade runs from 2021 through 2030. The reasoning of those who feel that the next historical decade begins in 2021 is described in these two (among several other) articles:
Here are two of their main points: - There was no “year 0” (“year zero”), so the time count must be off by one year.
- Each decade must conclude with a year ending in the numeral “0” (such as 2010), and the next decade must begin with a year ending in the numeral “1” (such as 2011).
Before addressing these points, it is important to understand that the terms “1st year” and “year 1” do So prior to its 1st birthday, a baby is 0 years old; only on its 1st birthday is the baby 1 year old. It is considered to be 1 year old (or age 1) during the entire next year, until its 2nd birthday is reached, when it becomes 2 years old. Then for the next year, the 3rd year of its life, it is considered to be 2 years old until its 3rd birthday comes around. Similary, when counting the number of seconds it takes for something to occur, we need to begin with 0, not with 1: Basing the time count of the centuries and millennia on the birth of Jesus complicates things, since the exact timing of His birth is unknown. Therefore, ages of time based on the terms “A.D.” ( The beginning of the Common Era can be considered to be Thus, the 1st year of the Common Era (C.E.) began at point 0 and ended at point 1. At point 1, and for the whole next year, the era was 1 year old, even though this was during the 2nd year. Then, for the whole next year, the era was 2 years old, even though this was during the 3rd year. During the 10th year, the era was 9 years old; it became 10 years (or 1 decade) old Therefore, the age of an era, in years, is determined on the The first decade of the second millennium Likewise, the second decade of the second millennium |