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DATE.CONVERT (DC)
$ If the year is less than the GLB.CENTURY-START year, GLB.CENTURY is the
following century.
Once GLB.CENTURY has been set to a value other than 0 or the century of the base year, it
remains set until explicitly changed or an invalid date is entered.
Examples
For example, GLB.CENTURY-START is 1957 (the same as GLB.BASE) and GLB.CENTURY
is 0 (or 19).
$ The years 57 through 99 represent 1957 through 1999.
$ The years 00 through 56 represent 2000 through 2056.
If you perform a date conversion with a year 50 followed by years of 60 and 70, andthe
DC; sets GLB.CENTURY field on the Primary Options screen is set to Y, the date
conversion will set GLB.CENTURY to 20 (as 1950 is prior to the value of
GLB.CENTURY-START), and the years are interpreted as 2050, 2060, and2070.
Special Date Conversions
Date conversion of the values of the following six-digit dates will not use GLB.CENTURY.
The current century will be used.
$ GLB.TODAY (TODAY)
$ GLB.TODAYS-DATE-NUM (TODAYS-DATE-NUM)
$ GLB.YYMMDD
$ INPUT-DATE
Invalid Input Dates
If the date involved is invalid, GLB.STATUS is set to *****. Alternatively, the GLB.STATUS;
command may be used to direct the result to a data item. It is important to test for an error
whenever the DATE.CONVERT; command is used.
GLB.STATUS is set to five asterisks (*****) under any one of the following circumstances:
$ Invalid input date is supplied, for example 31 February 1998.
$ Input date is prior to the start of the GLB.BASE year.
Note: GLB.CENTURY may be adjusted automatically to ensure that the
date is valid. For details, see ‘‘Use of GLB.BASE and
GLB.CENTURY’’, earlier in this section.
If GLB.STATUS is set to five asterisks, date conversion is still performed, but using the
current date. If the current date is invalid (for example, it is prior to the start of the base
year), then 1 January of the base year is used as input.
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