How to Exit the Battalion Through the Line of Fire

The 1980s refers to the period from 1980 to 1989.

The term used to divide a century into ten consecutive years is usually applicable to the year of the A.D. The decade from "zero" to "nine" in each century, for example, 1990 to 1999 is the 1990s. So the 1980s refers to the period from 1980 to 1989.

The pre decade definition is the same as the century division method, that is, every decade of each century is a period, the decade is the decade, and the first year is the first decade. There is no such thing as the decade and the decade, but the beginning and end of the century. For example, 1901-1910 is the first decade of the 20th century, 1981-1990 is the ninth decade of the 20th century, and 1991-2000 is the last decade of the 20th century. The 80s and 90s of digit alignment, that is, the same digit age, from 1980 to 1989, was defined as the 1980s, and from 1990 to 1999, as the 1990s.

Century refers to the unit for calculating the age. When used to calculate the date, the century usually starts from the year that can be divided by 100 or the year after, such as 2000 or 2001. The century is derived from Latin, and this odd number dating method comes from the era after the Jesus era. One year usually means "the year of our lord", so the first century is from AD 1 to AD 100, and the 20th century is from AD 1901 to AD 2000. Therefore, 2001 is the first year of the 21st century.

Time unit conversion:

1. The first century=100 years.

2. 1 year=12 months.

3. January=30 days.

4. 1 day=24 hours.

5. 1 hour=60 minutes.

6. 1 minute=60 seconds.

7. 1 second=1000 milliseconds.

8. 1 millisecond=1000 microseconds.

9. 1 microsecond=1000 nanoseconds.

10. 1 nanosecond=1000 picoseconds.