diff --git a/UI/Scheduler/English.lproj/Localizable.strings b/UI/Scheduler/English.lproj/Localizable.strings
index dd5321bf6..3237da11f 100644
--- a/UI/Scheduler/English.lproj/Localizable.strings
+++ b/UI/Scheduler/English.lproj/Localizable.strings
@@ -37,6 +37,8 @@
 "this month" = "this month";
 "Previous Month" = "Previous Month";
 "Next Month" = "Next Month";
+/* Week number prefix */
+"W" = "W";
 
 /* Year */
 "this year" = "this year";
diff --git a/UI/Scheduler/French.lproj/Localizable.strings b/UI/Scheduler/French.lproj/Localizable.strings
index 19832b8c1..536268822 100644
--- a/UI/Scheduler/French.lproj/Localizable.strings
+++ b/UI/Scheduler/French.lproj/Localizable.strings
@@ -37,6 +37,8 @@
 "this month" = "ce mois";
 "Previous Month" = "Mois précédent";
 "Next Month" = "Mois suivant";
+/* Week number prefix */
+"W" = "S";
 
 /* Year */
 "this year" = "Cette année";
diff --git a/UI/Scheduler/UIxCalMonthView.m b/UI/Scheduler/UIxCalMonthView.m
index 1c8757318..ac4a86586 100644
--- a/UI/Scheduler/UIxCalMonthView.m
+++ b/UI/Scheduler/UIxCalMonthView.m
@@ -234,6 +234,19 @@
   return daysNumbersToDisplay[i];
 }
 
+- (BOOL) isFirstDayOfWeek {
+  return 0 == [currentWeek indexOfObject: currentTableDay];
+}
+
+- (int) currentWeekNumber
+{
+  SOGoUser *user;
+
+  user = [context activeUser];
+  
+  return [user weekNumberForDate: currentTableDay];
+}
+
 - (void) setCurrentWeek: (NSArray *) newCurrentWeek
 {
   ASSIGN (currentWeek, newCurrentWeek);
diff --git a/UI/Templates/SchedulerUI/UIxCalMonthView.wox b/UI/Templates/SchedulerUI/UIxCalMonthView.wox
index ffc481052..5595a3212 100644
--- a/UI/Templates/SchedulerUI/UIxCalMonthView.wox
+++ b/UI/Templates/SchedulerUI/UIxCalMonthView.wox
@@ -89,6 +89,12 @@
                                  var:sg-day="currentTableDay.shortDateString"
                                  var:sg-day-number="currentDayNumber"
                                  var:sg-day-string="currentTableDay.iso8601DateString">
+                                 <!-- Week number -->
+                                 <var:if condition="isFirstDayOfWeek">
+                                    <div class="sg-calendar-tile-week">
+                                      <span class="md-default-theme md-default-theme md-hue-1 md-bg"><var:string label:value="W"/><var:string value="currentWeekNumber"/></span>
+                                    </div>
+                                 </var:if>
                   <div class="sg-calendar-tile-header md-default-theme md-fg md-hue-2">
                     <var:if condition="currentTableDay.isToday">
                       <span class="md-default-theme md-bg md-accent md-hue-2"><var:string value="currentTableDay.dayOfMonth"/></span> <var:string value="dayHeaderMonth"/>
diff --git a/UI/WebServerResources/scss/views/SchedulerUI.scss b/UI/WebServerResources/scss/views/SchedulerUI.scss
index 3a026147c..2db8519f3 100644
--- a/UI/WebServerResources/scss/views/SchedulerUI.scss
+++ b/UI/WebServerResources/scss/views/SchedulerUI.scss
@@ -242,6 +242,27 @@ $quarter_height: 10px;
     //font-weight: $sg-font-light;
   }
 
+  // Header of month week
+  .sg-calendar-tile-week {
+    font-size: $sg-font-size-2;
+    min-height: $sg-font-size-2 + 10px;
+    overflow: hidden;
+    padding: 4px;
+    text-align: left;
+    text-overflow: ellipsis;
+    white-space: nowrap;
+    //font-weight: $sg-font-light;
+    position: absolute;
+    width: 100%;
+  }
+  .sg-calendar-tile-week span {
+    padding: 1%;
+    border-radius: 30%;
+    color: $colorGrey50;
+  }
+
+  
+
   // The left column of hours
   .hours {
     display: inline-block;