diff --git a/CalendarPicker/Day.js b/CalendarPicker/Day.js
index 5c9de03..5e99a45 100644
--- a/CalendarPicker/Day.js
+++ b/CalendarPicker/Day.js
@@ -1,4 +1,4 @@
-import React from 'react';
+import React, { memo } from 'react';
 import {
   View,
   Text,
@@ -13,6 +13,14 @@ import { isSameDay } from 'date-fns/isSameDay';
 import { isWithinInterval } from 'date-fns/isWithinInterval';
 import { startOfDay } from 'date-fns/startOfDay';
 
+const DayComponent = memo(({ style, year, month, date, day, renderDay }) => {
+  if (renderDay) {
+    return renderDay({ year, month, day, date, style });
+  }
+
+  return <Text style={style}>{day}</Text>;
+});
+
 export default function Day(props) {
   const {
     day,
@@ -42,6 +50,7 @@ export default function Day(props) {
     minRangeDuration,
     maxRangeDuration,
     enableDateChange,
+    renderDay,
   } = props;
 
   const thisDay = new Date(year, month, day, 12);
@@ -193,13 +202,17 @@ export default function Day(props) {
       return (
         <View style={[styles.dayWrapper, custom.containerStyle]}>
           <View style={[custom.style, computedSelectedDayStyle, selectedDayStyle]}>
-            <Text style={[styles.dayLabel, textStyle,
-            styles.disabledText, disabledDatesTextStyle,
-            styles.selectedDisabledText, selectedDisabledDatesTextStyle,
-              overrideOutOfRangeTextStyle
-            ]}>
-              {day}
-            </Text>
+            <DayComponent style={[styles.dayLabel, textStyle,
+              styles.disabledText, disabledDatesTextStyle,
+              styles.selectedDisabledText, selectedDisabledDatesTextStyle,
+              overrideOutOfRangeTextStyle,
+            ]} 
+            day={day}
+            year={year}
+            month={month}
+            date={thisDay}
+            renderDay={renderDay}
+          />
           </View>
         </View>
       );
@@ -210,9 +223,14 @@ export default function Day(props) {
             disabled={!enableDateChange}
             style={[custom.style, computedSelectedDayStyle, selectedDayStyle]}
             onPress={() => onPressDay({ year, month, day })}>
-            <Text style={[styles.dayLabel, textStyle, custom.textStyle, selectedDayTextStyle]}>
-              {day}
-            </Text>
+            <DayComponent 
+              style={[styles.dayLabel, textStyle, custom.textStyle, selectedDayTextStyle]}
+              day={day}
+              year={year}
+              month={month}
+              date={thisDay}
+              renderDay={renderDay}
+            />
           </TouchableOpacity>
         </View>
       );
@@ -229,9 +247,14 @@ export default function Day(props) {
     return (
       <View style={[styles.dayWrapper, custom.containerStyle]}>
         <View style={[styles.dayButton, custom.style]}>
-          <Text style={[textStyle, styles.disabledText, disabledDatesTextStyle, custom.textStyle]}>
-            {day}
-          </Text>
+          <DayComponent 
+            style={[textStyle, styles.disabledText, disabledDatesTextStyle, custom.textStyle]}
+            day={day}
+            year={year}
+            month={month}
+            date={thisDay}
+            renderDay={renderDay}
+          />
         </View>
       </View>
     );
diff --git a/CalendarPicker/index.js b/CalendarPicker/index.js
index 6d1887e..9ca5186 100644
--- a/CalendarPicker/index.js
+++ b/CalendarPicker/index.js
@@ -415,6 +415,7 @@ export default class CalendarPicker extends Component {
       selectedRangeEndStyle: this.props.selectedRangeEndStyle,
       customDatesStyles: this.props.customDatesStyles,
       fontScaling: this.props.fontScaling,
+      renderDay: this.props.renderDay,
     };
   }
 
diff --git a/README.md b/README.md
index 7608f61..3a1cdac 100644
--- a/README.md
+++ b/README.md
@@ -138,8 +138,10 @@ const styles = StyleSheet.create({
 | **`headerWrapperStyle`**             | `ViewStyle`                  | Optional. Style for entire header controls wrapper. This contains the previous / next controls plus month & year.                                                                                                                                                                                                                                        |
 | **`monthTitleStyle`**                | `TextStyle`                  | Optional. Text styling for header's month text.                                                                                                                                                                                                                                                                                                          |
 | **`yearTitleStyle`**                 | `TextStyle`                  | Optional. Text styling for header's year text.                                                                                                                                                                                                                                                                                                           |
-| **`initialView`**                    | `String`                     | Optional. The view that the calendar opens to. Default is `days`. Available options are `years`, `months`, and `days`.                                                                                                                                                                                                                                   |
-| **`fontScaling`**                    | `Boolean`                    | Optional. To enable fontScaling. Default is `true`                                                                                                                                                                                                                                                                                                       |
+| **`initialView`**                    | `String`                     | Optional. The view that the calendar opens to. Default is `days`. Available options are `years`, `months`, and `days`.
+| **`renderDay`**                      | `Function`                   | Optional. Allows customization of day rendering by accepting a custom render prop that receives `{date: Date/DateFn, day: number, month: number, year: number, style: TextStyle}` and returns JSX Element.                                                                                                                                                                                                                                 |
+| **`fontScaling`**                    | `Boolean`                    | Optional. To enable fontScaling. Default is `true`                                                                                                                                                
+|                                                                                                                                                  
 
 # Styles