Index: Themes/default/Trunk/stylesheets/project/calendar.css
===================================================================
--- Themes/default/Trunk/stylesheets/project/calendar.css	(revision 0)
+++ Themes/default/Trunk/stylesheets/project/calendar.css	(revision 0)
@@ -0,0 +1,39 @@
+.calendar th {
+  width: 14%; 
+  text-align: center;
+}
+
+.calendar th.weekend {
+  background-color: #c8d7ff;
+}
+
+.calendar td {
+  background-color: #eee;
+}
+
+.calendar .date {
+  margin-bottom: 4px;
+  padding-right: 4px;
+  text-align: right;
+  font-weight: bold;
+}
+
+.calendar td.weekend .date {
+  background-color: #c8d7ff;
+}
+
+.calendar td.weekday .date {
+  background-color: #d9e8ff;
+}
+
+.calendar .month-nav {
+  font-weight: bold;
+}
+
+.calendar .month-nav .prev-month {
+  float: left;
+}
+
+.calendar .month-nav .next-month {
+  float: right;
+}
Index: ProjectPier/Trunk/language/en_us/errors.php
===================================================================
--- ProjectPier/Trunk/language/en_us/errors.php	(revision 145)
+++ ProjectPier/Trunk/language/en_us/errors.php	(working copy)
@@ -12,6 +12,7 @@
   
     // General
     'invalid email address' => 'Email address format is not valid',
+    'id missing' => 'Required ID value is missing',
    
     // Company validation errors
     'company name required' => 'Company / organization name is required',
Index: ProjectPier/Trunk/language/en_us/general.php
===================================================================
--- ProjectPier/Trunk/language/en_us/general.php	(revision 145)
+++ ProjectPier/Trunk/language/en_us/general.php	(working copy)
@@ -117,6 +117,14 @@
     'month 10' => 'October',
     'month 11' => 'November',
     'month 12' => 'December',
+
+    'dow 1' => 'Monday',
+    'dow 2' => 'Tuesday',
+    'dow 3' => 'Wednesday',
+    'dow 4' => 'Thursday',
+    'dow 5' => 'Friday',
+    'dow 6' => 'Saturday',
+    'dow 7' => 'Sunday',
   ); // array
 
 ?>
Index: ProjectPier/Trunk/language/en_us/actions.php
===================================================================
--- ProjectPier/Trunk/language/en_us/actions.php	(revision 145)
+++ ProjectPier/Trunk/language/en_us/actions.php	(working copy)
@@ -63,6 +63,7 @@
     'add milestone' => 'Add milestone',
     'edit milestone' => 'Edit milestone',
     'delete milestone' => 'Delete milestone',
+    'view calendar' => 'View calendar',
     
     // People
     'update people' => 'Update',
Index: ProjectPier/Trunk/application/models/projects/Project.class.php
===================================================================
--- ProjectPier/Trunk/application/models/projects/Project.class.php	(revision 145)
+++ ProjectPier/Trunk/application/models/projects/Project.class.php	(working copy)
@@ -496,6 +496,31 @@
       } // if
     } // splitOpenMilestones
     
+
+    /**
+    * Return array of milestones for the month specified that the user has
+    * haccess to.
+    *
+    * @access public
+    * @param int $year
+    * @param int $month
+    * @return array
+    */
+    function getMilestonesByMonth($year, $month) {
+      $from_date = DateTimeValueLib::make(0, 0, 0, $month, 1, $year);
+      $to_date = new DateTimeValue(strtotime('+1 month -1 day', $from_date->getTimestamp()));
+
+      if (logged_user()->isMemberOfOwnerCompany()) {
+        $conditions = array('`project_id` = ? AND (`due_date` >= ? AND `due_date` < ?)', $this->getId(), $from_date, $to_date);
+      } else {
+        $conditions = array('`project_id` = ? AND (`due_date` >= ? AND `due_date` < ?) AND `is_private` = ?', $this->getId(), $from_date, $to_date, 0);
+      }
+      return ProjectMilestones::findAll(array(
+        'conditions' => $conditions,
+        'order' => 'due_date'
+      )); // findAll
+    } // getMilestonesByMonth
+
     // ---------------------------------------------------
     //  Task lists
     // ---------------------------------------------------
Index: ProjectPier/Trunk/application/controllers/MilestoneController.class.php
===================================================================
--- ProjectPier/Trunk/application/controllers/MilestoneController.class.php	(revision 145)
+++ ProjectPier/Trunk/application/controllers/MilestoneController.class.php	(working copy)
@@ -362,6 +362,32 @@
       $this->redirectToReferer($milestone->getViewUrl());
     } // open
   
+    /**
+    * Show calendar view milestone page
+    *
+    * @access public
+    * @param void
+    * @return null
+    */
+    function calendar() {
+      $this->addHelper('textile');
+
+      $project = active_project();
+      $id = get_id();
+      if (strlen($id) == 0) {
+        $id = gmdate('Ym');
+      }
+      if (preg_match('/^(\d{4})(\d{2})$/', $id, $matches)) {
+        list (, $year, $month) = $matches;
+        tpl_assign('year', $year);
+        tpl_assign('month', $month);
+      } else {
+        flash_error(lang('id missing'));
+        $this->redirectToReferer(get_url('milestone'));
+      }
+      tpl_assign('milestones', $project->getMilestonesByMonth($year, $month));
+    } // calendar
+
   } // MilestoneController
 
 ?>
Index: ProjectPier/Trunk/application/views/milestone/calendar.php
===================================================================
--- ProjectPier/Trunk/application/views/milestone/calendar.php	(revision 0)
+++ ProjectPier/Trunk/application/views/milestone/calendar.php	(revision 0)
@@ -0,0 +1,137 @@
+<?php
+
+  set_page_title(lang('milestones'));
+  project_tabbed_navigation(PROJECT_TAB_MILESTONES);
+  project_crumbs(array(
+    array(lang('milestones'), get_url('milestone')),
+    array(lang('view calendar'))
+  ));
+  if (ProjectMilestone::canAdd(logged_user(), active_project())) {
+    add_page_action(lang('add milestone'), get_url('milestone', 'add'));
+  } // if
+  add_stylesheet_to_page('project/calendar.css');
+
+?>
+<div class="calendar">
+  <h2><?php echo clean(lang(sprintf('month %u', $month))); ?> <?php echo $year; ?></h2>
+<?php
+  $calendar = array();
+  if (is_array($milestones) && count($milestones)) {
+    foreach ($milestones as $milestone) {
+      $due = $milestone->getDueDate();
+      if ($due->getYear() != $year or $due->getMonth() != $month) {
+        continue;
+      }
+      $calendar[$due->getDay()][] = $milestone;
+    }
+  } // if
+  $thisMonth = gmmktime(0, 0, 0, $month, 1, $year);
+  $prevMonth = strtotime('-1 month', $thisMonth);
+  $nextMonth = strtotime('+1 month', $thisMonth);
+  $daysInMonth = gmdate('d', strtotime('+1 month -1 day', $thisMonth));
+  $firstDayOfWeek = 1; // configurable?
+  $daysInWeek = 7;
+  $lastDayOfWeek = $firstDayOfWeek + $daysInWeek;
+  $firstDayOfMonth = gmdate('w', $thisMonth);
+?>
+  <table width="100%">
+    <tr valign="top">
+<?php
+  for ($dow = $firstDayOfWeek; $dow < $lastDayOfWeek; $dow++) {
+    if (in_array($dow > $daysInWeek ? $dow - $daysInWeek : $dow, array(1, 7))) {
+      $dow_class = "weekend";
+    } else {
+      $dow_class = "weekday";
+    }
+?>
+      <th class="<?php echo $dow_class; ?>"><?php echo clean(lang(sprintf('dow %u', $dow > $daysInWeek ? $dow - $daysInWeek : $dow))); ?></th>
+<?php
+  } // for
+?>
+    </tr>
+    <tr valign="top">
+<?php
+
+  /*
+   * Skip days from previous month.
+   */
+
+  for ($dow = $firstDayOfWeek; $dow <= $firstDayOfMonth; $dow++) {
+    if (in_array($dow > $daysInWeek ? $dow - $daysInWeek : $dow, array(1, 7))) {
+      $dow_class = "weekend";
+    } else {
+      $dow_class = "weekday";
+    }
+?>
+      <td class="<?php echo $dow_class; ?>">&nbsp;</td>
+<?php
+  } // for
+
+  /*
+   * Render the month's calendar.
+   */
+
+  for ($dom = 1; $dom <= $daysInMonth;) {
+    for (; ($dow < $lastDayOfWeek) && ($dom <= $daysInMonth); $dow++, $dom++) {
+      if (in_array($dow > $daysInWeek ? $dow - $daysInWeek : $dow, array(1, 7))) {
+        $dow_class = "weekend";
+      } else {
+        $dow_class = "weekday";
+      }
+?>
+      <td class="<?php echo $dow_class; ?>">
+        <div class="date"><?php echo $dom; ?></div>
+<?php
+      if (isset($calendar[$dom]) && is_array($calendar[$dom])
+        && count($calendar[$dom])) {
+?>
+        <ul class="entries">
+<?php
+          foreach ($calendar[$dom] as $m) {
+            printf('<li><a href="%s">%s</a></li>'."\n",
+              get_url("milestone", "view", $m->getId()),
+              clean($m->getName()));
+          }
+?>
+        <ul>
+<?php
+        } // if
+?>
+      </td>
+<?php
+    } // for
+?>
+<?php if ($dom <= $daysInMonth) { ?>
+    </tr>
+    <tr valign="top">
+<?php
+      $dow = $firstDayOfWeek;
+    } // if
+  } // for
+
+  /*
+   * Skip days from next month.
+   */
+
+  if ($dow < $lastDayOfWeek) {
+    for (; $dow < $lastDayOfWeek; $dow++) {
+      if (in_array($dow > $daysInWeek ? $dow - $daysInWeek : $dow, array(1, 7))) {
+        $dow_class = "weekend";
+      } else {
+        $dow_class = "weekday";
+      }
+?>
+      <td class="<?php echo $dow_class; ?>">&nbsp;</td>
+<?php
+    } // for
+?>
+    </tr>
+<?php
+  } // if
+?>
+  </table>
+  <div class="month-nav">
+    <div class="prev-month"><a href="<?php echo get_url('milestone', 'calendar', gmdate('Ym', $prevMonth)); ?>"><?php echo clean(lang(sprintf('month %u', gmdate('m', $prevMonth)))); ?> <?php echo gmdate('Y', $prevMonth); ?></a></div>
+    <div class="next-month"><a href="<?php echo get_url('milestone', 'calendar', gmdate('Ym', $nextMonth)); ?>"><?php echo clean(lang(sprintf('month %u', gmdate('m', $nextMonth)))); ?> <?php echo gmdate('Y', $nextMonth); ?></a></div>
+  </div>
+</div>
Index: ProjectPier/Trunk/application/views/milestone/index.php
===================================================================
--- ProjectPier/Trunk/application/views/milestone/index.php	(revision 145)
+++ ProjectPier/Trunk/application/views/milestone/index.php	(working copy)
@@ -6,6 +6,7 @@
   if (ProjectMilestone::canAdd(logged_user(), active_project())) {
     add_page_action(lang('add milestone'), get_url('milestone', 'add'));
   } // if
+  add_page_action(lang('view calendar'), get_url('milestone', 'calendar'));
 
 ?>
 <?php if ($late_milestones || $today_milestones || $upcoming_milestones) { ?>