diff --git a/src/specs/NativeModuleDatePicker.js b/src/specs/NativeModuleDatePicker.js
index 4ad5f85d..035e7cf2 100644
--- a/src/specs/NativeModuleDatePicker.js
+++ b/src/specs/NativeModuleDatePicker.js
@@ -9,7 +9,7 @@ export type DatePickerOpenParams = $ReadOnly<{
   maximumDate?: number,
   minimumDate?: number,
   testID?: string,
-  timeZoneName?: number,
+  timeZoneName?: string,
   timeZoneOffsetInMinutes?: number,
   startOnYearSelection?: boolean,
 }>;
diff --git a/src/specs/NativeModuleMaterialDatePicker.js b/src/specs/NativeModuleMaterialDatePicker.js
index 643f1b6f..faa35262 100644
--- a/src/specs/NativeModuleMaterialDatePicker.js
+++ b/src/specs/NativeModuleMaterialDatePicker.js
@@ -11,7 +11,7 @@ export type DatePickerOpenParams = $ReadOnly<{
   minimumDate?: number,
   fullscreen?: boolean,
   testID?: string,
-  timeZoneName?: number,
+  timeZoneName?: string,
   timeZoneOffsetInMinutes?: number,
   firstDayOfWeek?: number,
   startOnYearSelection?: boolean,
diff --git a/src/specs/NativeModuleMaterialTimePicker.js b/src/specs/NativeModuleMaterialTimePicker.js
index ed339445..2bab107f 100644
--- a/src/specs/NativeModuleMaterialTimePicker.js
+++ b/src/specs/NativeModuleMaterialTimePicker.js
@@ -8,6 +8,7 @@ export type TimePickerOpenParams = $ReadOnly<{
   initialInputMode?: string,
   title?: string,
   is24Hour?: boolean,
+  timeZoneName?: string,
   timeZoneOffsetInMinutes?: number,
 }>;
 
diff --git a/src/specs/NativeModuleTimePicker.js b/src/specs/NativeModuleTimePicker.js
index eaed3971..c3a2ac66 100644
--- a/src/specs/NativeModuleTimePicker.js
+++ b/src/specs/NativeModuleTimePicker.js
@@ -8,6 +8,7 @@ export type TimePickerOpenParams = $ReadOnly<{
   display?: string,
   is24Hour?: boolean,
   minuteInterval?: number,
+  timeZoneName?: string,
   timeZoneOffsetInMinutes?: number,
 }>;