# example holiday section in file monk.conf

  *Holiday

   1/1                             = New Year's Day
   third Monday in Feb             = Presidents' Day
   fourth Thu in Nov               = Thanksgiving
   4/25                            = The bestest holiday ever!
   # The Friday after Thanksgiving is an unnamed holiday most places
   fourth Thu in Nov + 1 day       =

   1*0:0:0:0:0:0*EASTER            = Easter
   1*11:0:11:0:0:0*CWD             = Veteren's Day (observed)
   1*0:0:0:0:0:0*EASTER,PD5        = Good Friday


# quickie Perl script
use Date::Manip;

Date_Init("TZ=EDT","GlobalCnf=monk.conf");

if ( Date_IsHoliday(ParseDate('today')) ) {
    print "Today is " . Date_IsHoliday(ParseDate('today'));
}