+----------+
     | NUMERICS |
     +----------+

2-DIGIT-YEAR FORMAT.

A format that provides a year date as two digits only
to represent a year within a specific century.  The two
high-order digits of the year are truncated; for
example "1995" is represented as "95". (IBM)

4-DIGIT-YEAR FORMAT.

A format that provides a year date as four digits: the
two high-order digits represent the century and the two
low-order digits represent the year within the century.
For example, "1995" represents the year 1995; "2095"
represents the year "2095". (IBM)

20TH CENTURY.

The period of time 0000.00 hrs 1901-January-1 through
2400.00 hrs 2000-December-31. (IBM)

21ST CENTURY.

The period of time 0000.00 hrs 2001-January-1 through
2400.00 hrs 2100-December-31. (IBM)

24-HOUR TIME

Twenty-four-hour time is widely used in scientific work
throughout the world.  In the U.S. it is used also in
operations of the Armed Forces.  In Europe it is
frequently used by the transportation networks in
preference to the 12-hour am and pm system.  With the
24-hour system, the day begins at midnight and is
designated 0000 through 2359.  (FW)