diff --git a/example/src/mocks/theme.ts b/example/src/mocks/theme.ts
index 974eeedc21..b2b0903918 100644
--- a/example/src/mocks/theme.ts
+++ b/example/src/mocks/theme.ts
@@ -22,6 +22,7 @@ export function getTheme() {
     textDayHeaderFontSize: 12,
     textDayHeaderFontFamily: 'HelveticaNeue',
     textDayHeaderFontWeight: 'normal' as const,
+    textDayHeaderStyle: {},
     // dates
     dayTextColor: themeColor,
     todayTextColor: '#af0078',
diff --git a/src/agenda/style.ts b/src/agenda/style.ts
index 60176e3975..7323d9e3d2 100644
--- a/src/agenda/style.ts
+++ b/src/agenda/style.ts
@@ -40,7 +40,8 @@ export default function styleConstructor(theme: Theme = {}) {
       fontSize: appStyle.textDayHeaderFontSize,
       fontFamily: appStyle.textDayHeaderFontFamily,
       fontWeight: appStyle.textDayHeaderFontWeight,
-      color: appStyle.textSectionTitleColor
+      color: appStyle.textSectionTitleColor,
+      ...appStyle.textDayHeaderStyle
     },
     reservations: {
       flex: 1,
diff --git a/src/calendar/header/style.ts b/src/calendar/header/style.ts
index 173546a133..e3d36335d4 100644
--- a/src/calendar/header/style.ts
+++ b/src/calendar/header/style.ts
@@ -63,7 +63,8 @@ export default function (theme: Theme = {}) {
       fontSize: appStyle.textDayHeaderFontSize,
       fontFamily: appStyle.textDayHeaderFontFamily,
       fontWeight: appStyle.textDayHeaderFontWeight,
-      color: appStyle.textSectionTitleColor
+      color: appStyle.textSectionTitleColor,
+      ...appStyle.textDayHeaderStyle
     },
     disabledDayHeader: {
       color: appStyle.textSectionTitleDisabledColor
diff --git a/src/expandableCalendar/style.ts b/src/expandableCalendar/style.ts
index 883376a944..c099535fe9 100644
--- a/src/expandableCalendar/style.ts
+++ b/src/expandableCalendar/style.ts
@@ -84,7 +84,8 @@ export default function styleConstructor(theme: Theme = {}) {
       fontSize: appStyle.textDayHeaderFontSize,
       fontFamily: appStyle.textDayHeaderFontFamily,
       fontWeight: appStyle.textDayHeaderFontWeight,
-      color: appStyle.textSectionTitleColor
+      color: appStyle.textSectionTitleColor,
+      ...appStyle.textDayHeaderStyle
     },
     monthView: {
       backgroundColor: appStyle.calendarBackground
diff --git a/src/style.ts b/src/style.ts
index a874d42482..34b71834c4 100644
--- a/src/style.ts
+++ b/src/style.ts
@@ -14,6 +14,7 @@ export const todayButtonFontFamily = 'System';
 export const textDayFontWeight = '300';
 export const textMonthFontWeight = '300';
 export const textDayHeaderFontWeight = undefined;
+export const textDayHeaderStyle = undefined;
 export const todayButtonFontWeight = '600';
 
 export const textDayFontSize = 16;
diff --git a/src/types.ts b/src/types.ts
index b44e2dd0f7..8ff7602f76 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -52,6 +52,7 @@ export interface Theme {
   textDayFontWeight?: TextStyle['fontWeight'];
   textMonthFontWeight?: TextStyle['fontWeight'];
   textDayHeaderFontWeight?: TextStyle['fontWeight'];
+  textDayHeaderStyle?: TextStyle;
   textDayFontSize?: number;
   textMonthFontSize?: number;
   textDayHeaderFontSize?: number;