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diff --git a/src/boost/libs/date_time/example/gregorian/period_calc.cpp b/src/boost/libs/date_time/example/gregorian/period_calc.cpp
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+/*
+This example demonstrates a simple use of periods for the calculation
+of date information.
+
+The example calculates if a given date is a weekend or holiday
+given an exclusion set.  That is, each weekend or holiday is
+entered into the set as a time interval.  Then if a given date
+is contained within any of the intervals it is considered to
+be within the exclusion set and hence is a offtime.
+
+Output:
+Number Excluded Periods: 5
+20020202/20020203
+20020209/20020210
+20020212/20020212
+20020216/20020217
+In Exclusion Period: 20020216 --> 20020216/20020217
+20020223/20020224
+
+*/
+
+
+#include "boost/date_time/gregorian/gregorian.hpp"
+#include <set>
+#include <algorithm>
+#include <iostream>
+
+typedef std::set<boost::gregorian::date_period> date_period_set;
+
+//Simple population of the exclusion set
+date_period_set
+generateExclusion()
+{
+  using namespace boost::gregorian;
+  date_period periods_array[] = 
+    { date_period(date(2002,Feb,2), date(2002,Feb,4)),//weekend of 2nd-3rd
+      date_period(date(2002,Feb,9), date(2002,Feb,11)),
+      date_period(date(2002,Feb,16), date(2002,Feb,18)),
+      date_period(date(2002,Feb,23), date(2002,Feb,25)),
+      date_period(date(2002,Feb,12), date(2002,Feb,13))//a random holiday 2-12
+    };
+  const int num_periods = sizeof(periods_array)/sizeof(date_period);
+
+  date_period_set ps;
+  //insert the periods in the set
+  std::insert_iterator<date_period_set> itr(ps, ps.begin());
+  std::copy(periods_array, periods_array+num_periods, itr );
+  return ps;
+  
+}
+
+
+int main() 
+{
+  using namespace boost::gregorian;
+  
+  date_period_set ps = generateExclusion();
+  std::cout << "Number Excluded Periods: "  << ps.size() << std::endl;
+
+  date d(2002,Feb,16);
+  date_period_set::const_iterator i = ps.begin();
+  //print the periods, check for containment
+  for (;i != ps.end(); i++) {
+    std::cout << to_iso_string(*i) << std::endl;
+    //if date is in exclusion period then print it
+    if (i->contains(d)) {
+      std::cout << "In Exclusion Period: "
+                << to_iso_string(d) << " --> " << to_iso_string(*i)
+                << std::endl;
+    }
+  }
+
+  return 0;  
+
+}
+
+
+
+
+/*  Copyright 2001-2004: CrystalClear Software, Inc
+ *  http://www.crystalclearsoftware.com
+ *
+ *  Subject to the Boost Software License, Version 1.0.
+ * (See accompanying file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
+ */
+