diff --git a/components/lib/calendar/Calendar.d.ts b/components/lib/calendar/Calendar.d.ts
index 68629b3e3..55a404a98 100755
--- a/components/lib/calendar/Calendar.d.ts
+++ b/components/lib/calendar/Calendar.d.ts
@@ -801,6 +801,30 @@ export interface CalendarSlots {
          */
         class: any;
     }): VNode[];
+    /**
+     * Custom header for the showWeek
+     */
+    showWeekHeader(): VNode[];
+    /**
+     * Custom showWeek template
+     * @param {Object} scope - showWeek slot params
+     */
+    showWeek(scope: {
+        /**
+         * Date information corresponding to first day of week
+         */
+        date: {
+            day: number;
+            month: number;
+            year: number;
+            today: boolean;
+            selectable: boolean;
+        };
+        /**
+         * Internally calculated week number
+         */
+        weekNumber: number;
+    }): VNode[];
 }
 
 /**
diff --git a/components/lib/calendar/Calendar.vue b/components/lib/calendar/Calendar.vue
index 48d1bbc6d..3b82b8456 100755
--- a/components/lib/calendar/Calendar.vue
+++ b/components/lib/calendar/Calendar.vue
@@ -169,7 +169,11 @@
                                         <thead v-bind="ptm('tableHeader')">
                                             <tr v-bind="ptm('tableHeaderRow')">
                                                 <th v-if="showWeek" scope="col" :class="cx('weekHeader')" v-bind="ptm('weekHeader', { context: { disabled: showWeek } })" :data-p-disabled="showWeek" data-pc-group-section="tableheadercell">
-                                                    <span v-bind="ptm('weekLabel')" data-pc-group-section="tableheadercelllabel">{{ weekHeaderLabel }}</span>
+                                                    <slot name="showWeekHeader">
+                                                        <span v-bind="ptm('weekLabel')" data-pc-group-section="tableheadercelllabel">
+                                                            {{ weekHeaderLabel }}
+                                                        </span>
+                                                    </slot>
                                                 </th>
                                                 <th v-for="weekDay of weekDays" :key="weekDay" scope="col" :abbr="weekDay" v-bind="ptm('tableHeaderCell')" data-pc-group-section="tableheadercell">
                                                     <span v-bind="ptm('weekDay')" data-pc-group-section="tableheadercelllabel">{{ weekDay }}</span>
@@ -180,8 +184,10 @@
                                             <tr v-for="(week, i) of month.dates" :key="week[0].day + '' + week[0].month" v-bind="ptm('tableBodyRow')">
                                                 <td v-if="showWeek" :class="cx('weekNumber')" v-bind="ptm('weekNumber')" data-pc-group-section="tablebodycell">
                                                     <span :class="cx('weekLabelContainer')" v-bind="ptm('weekLabelContainer', { context: { disabled: showWeek } })" :data-p-disabled="showWeek" data-pc-group-section="tablebodycelllabel">
-                                                        <span v-if="month.weekNumbers[i] < 10" style="visibility: hidden" v-bind="ptm('weekLabel')">0</span>
-                                                        {{ month.weekNumbers[i] }}
+                                                        <slot name="showWeek" :date="week[i]" :weekNumber="month.weekNumbers[i]">
+                                                            <span v-if="month.weekNumbers[i] < 10" style="visibility: hidden" v-bind="ptm('weekLabel')">0</span>
+                                                            {{ month.weekNumbers[i] }}
+                                                        </slot>
                                                     </span>
                                                 </td>
                                                 <td