Patches for fixing https://github.com/facebook/react-native/issues/8169

@react-native-community+datetimepicker+3.4.0

diff --git a/node_modules/@react-native-community/datetimepicker/ios/RNDateTimePickerManager.m b/node_modules/@react-native-community/datetimepicker/ios/RNDateTimePickerManager.m
index d1cd1cd..817f6c9 100644
--- a/node_modules/@react-native-community/datetimepicker/ios/RNDateTimePickerManager.m
+++ b/node_modules/@react-native-community/datetimepicker/ios/RNDateTimePickerManager.m
@@ -31,13 +31,16 @@ @implementation RCTConvert(UIDatePicker)
 
 @end
 
-@implementation RNDateTimePickerManager
+@implementation RNDateTimePickerManager {
+  RNDateTimePicker* createdView;
+}
 
 RCT_EXPORT_MODULE()
 
 - (UIView *)view
 {
-  return [RNDateTimePicker new];
+  createdView = [RNDateTimePicker new];
+  return createdView;
 }
 
 + (NSString*) datepickerStyleToString: (UIDatePickerStyle) style {
@@ -57,6 +60,31 @@ + (NSString*) datepickerStyleToString: (UIDatePickerStyle) style {
     }
 }
 
+RCT_EXPORT_METHOD(getCurrentValueUTC:(RCTPromiseResolveBlock)resolve rejecter:(RCTPromiseRejectBlock)reject)
+{
+    dispatch_async(dispatch_get_main_queue(), ^{
+        if (self->createdView == nil) {
+            resolve(@{
+                @"error": @"RNDateTimePickerManager.m createdView not initialised",
+            });
+        } else {
+            static NSDateFormatter *formatter;
+            static dispatch_once_t onceToken;
+            dispatch_once(&onceToken, ^{
+                formatter = [NSDateFormatter new];
+                formatter.dateFormat = @"yyyy-MM-dd'T'HH:mm:ss.SSSZZZZZ";
+                formatter.locale = [NSLocale localeWithLocaleIdentifier:@"en_US_POSIX"];
+                formatter.timeZone = [NSTimeZone timeZoneWithName:@"UTC"];
+            });
+            NSDate *chosenDate = [self->createdView date];
+
+            resolve(@{
+                @"value": [formatter stringFromDate:chosenDate],
+            });
+        }
+    });
+}
+
 RCT_EXPORT_METHOD(getDefaultDisplayValue:(NSDictionary *)options resolver:(RCTPromiseResolveBlock)resolve rejecter:(RCTPromiseRejectBlock)reject)
 {
     dispatch_async(dispatch_get_main_queue(), ^{
diff --git a/node_modules/@react-native-community/datetimepicker/src/datetimepicker.ios.js b/node_modules/@react-native-community/datetimepicker/src/datetimepicker.ios.js
index dae9076..b6f3f41 100644
--- a/node_modules/@react-native-community/datetimepicker/src/datetimepicker.ios.js
+++ b/node_modules/@react-native-community/datetimepicker/src/datetimepicker.ios.js
@@ -15,7 +15,7 @@ import {IOS_DISPLAY, MODE_DATE} from './constants';
 import invariant from 'invariant';
 import React, {useEffect, useState} from 'react';
 import {getPickerHeightStyle} from './layoutUtilsIOS';
-import {Platform, StyleSheet} from 'react-native';
+import {Platform, StyleSheet, NativeModules} from 'react-native';
 
 import type {
   Event,
@@ -41,6 +41,10 @@ const getDisplaySafe = (display: IOSDisplay) => {
   return display;
 };
 
+export const getCurrentValueUTC = () => {
+  return NativeModules.RNDateTimePickerManager.getCurrentValueUTC();
+}
+
 export default function Picker({
   value,
   locale,
@@ -107,6 +111,7 @@ export default function Picker({
   const dates: DatePickerOptions = {value, maximumDate, minimumDate};
   toMilliseconds(dates, 'value', 'minimumDate', 'maximumDate');
 
+
   return (
     <RNDateTimePicker
       testID={testID}
diff --git a/node_modules/@react-native-community/datetimepicker/src/index.d.ts b/node_modules/@react-native-community/datetimepicker/src/index.d.ts
index abf71ba..f030803 100644
--- a/node_modules/@react-native-community/datetimepicker/src/index.d.ts
+++ b/node_modules/@react-native-community/datetimepicker/src/index.d.ts
@@ -189,6 +189,11 @@ export type WindowsNativeProps = Readonly<
 
 declare const RNDateTimePicker: FC<
   IOSNativeProps | AndroidNativeProps | WindowsNativeProps
->;
+>
 
+/**
+ * Imperatively fetches the datetime
+ * Fix for: https://github.com/facebook/react-native/issues/8169
+ */
+export type getCurrentValueUTC = () => Promise<{value?: string, error?: string}>;
 export default RNDateTimePicker;
diff --git a/node_modules/@react-native-community/datetimepicker/src/index.js b/node_modules/@react-native-community/datetimepicker/src/index.js
index fbab875..848fa35 100644
--- a/node_modules/@react-native-community/datetimepicker/src/index.js
+++ b/node_modules/@react-native-community/datetimepicker/src/index.js
@@ -1,3 +1,3 @@
 import RNDateTimePicker from './datetimepicker';
-
+export {getCurrentValueUTC} from './datetimepicker';
 export default RNDateTimePicker;

react-native-modal-datetime-picker+9.2.0

diff --git a/node_modules/react-native-modal-datetime-picker/src/DateTimePickerModal.ios.js b/node_modules/react-native-modal-datetime-picker/src/DateTimePickerModal.ios.js
index a52a805..335f96c 100644
--- a/node_modules/react-native-modal-datetime-picker/src/DateTimePickerModal.ios.js
+++ b/node_modules/react-native-modal-datetime-picker/src/DateTimePickerModal.ios.js
@@ -7,7 +7,7 @@ import {
   View,
   Appearance,
 } from "react-native";
-import DateTimePicker from "@react-native-community/datetimepicker";
+import DateTimePicker, { getCurrentValueUTC } from "@react-native-community/datetimepicker";
 import Modal from "./Modal";
 import { isIphoneX } from "./utils";
 
@@ -71,6 +71,10 @@ export class DateTimePickerModal extends React.PureComponent {
     return null;
   }
 
+  getDate = () => {
+    return getCurrentValueUTC();
+  }
+
   handleCancel = () => {
     this.didPressConfirm = false;
     this.props.onCancel();
diff --git a/node_modules/react-native-modal-datetime-picker/typings/index.d.ts b/node_modules/react-native-modal-datetime-picker/typings/index.d.ts
index f1b1f40..3795121 100644
--- a/node_modules/react-native-modal-datetime-picker/typings/index.d.ts
+++ b/node_modules/react-native-modal-datetime-picker/typings/index.d.ts
@@ -210,4 +210,10 @@ export type ReactNativeModalDateTimePickerProps = DateTimePickerProps &
 export default class DateTimePicker extends React.Component<
   ReactNativeModalDateTimePickerProps,
   any
-> {}
+> {
+  /**
+   * Imperatively fetches the datetime
+   * Fix for: https://github.com/facebook/react-native/issues/8169
+   */
+   getDate?: () => Promise<{value?: string, error?: string}>;
+}

This fixes cases of scrolling and then confirming in a DateTimePicker returning the wrong item.
It fixes it by asking the DateTimePicker what the selected value is whenever the user confirms. The idea was taken from here.

Usage:

this.timePickerRef.current.getDate() whenever we want to imperatively get the date or time

my declared component looks sth like:

<TimerPicker
          ref={this.timePickerRef}

and timePickerRef is this:
private timePickerRef: RefObject<TimerPicker> = React.createRef();