1 HOLIDAY
 The function of this command procedure is to translate the system
 logical name HOLIDAYS and compare the list of dates against the current
 date.  If a match is found then the supplied global symbol will be set
 to YES otherwise it will be set to NO.

 Syntax:
          @disk:[directory]HOLIDAY  global_symbol  [date]

2 global_symbol
 global_symbol (P1) - specifies the name of a global symbol that will 
    contain the results of the test.  If the date being tested is in
    the list of dates specified by the system logical name HOLIDAYS
    then the global symbol will be set equal to YES otherwise it will
    be set equal to NO. 

2 date
 date (P2) - is optional and specifies a date to be used for
    comparison. If this parameter is not supplied then the current
    date will used. 

2 HOLIDAYS
 HOLIDAYS is a logical name used to contain the dates which are to be
 considered holidays.  The syntax for storing dates in the logical name
 is the following: 

    dd-mmm-yyyy			        ! single date
    dd-mmm-yyyy;dd-mmm-yyyy;dd-mmm-yyyy ! single dates ';' separator
    dd-mmm-yyyy:dd-mmm-yyyy		! date range ':' separator

 single dates and date ranges may be intermixed with ';' separating
 date ranges from single dates. 

    dd-mmm-yyyy;dd-mmm-yyyy:dd-mmm-yyyy;dd-mmm-yyyy;dd-mmm-yyyy
    SSSSSSSSSSS RRRRRRRRRRRRRRRRRRRRRRR SSSSSSSSSSS SSSSSSSSSSS
     single      range                   single      single

