bug: The year / month selected in the year / month picker will be reflected in the calendar with a one-month shift.

Prerequisites

• I have read the Contributing Guidelines.
• I agree to follow the Code of Conduct.
• I have searched for existing issues that already report this problem, without success.

Ionic Framework Version

• v4.x
• v5.x
• v6.x

Current Behavior

Safari on iPhone iOS 15.1

• In Safari on iOS, after the ion-datetime embedded in ion-popover is displayed, the year / month selected in the year / month picker will be reflected in the calendar with a one-month shift.

https://user-images.githubusercontent.com/87968771/146101658-5c7cff37-9617-4e5d-b32e-ccb31797beb1.mp4

Google Chrome on Android 12 or Windows10

• However, it will be reflected correctly on Google Chrome on Android or Windows.

https://user-images.githubusercontent.com/87968771/146101870-ee8c0f4d-673e-485f-b51c-56f27592abf3.mp4

Expected Behavior

• I want you to improve the behavior of Safari on iOS.

Steps to Reproduce

1. Run the code below to build.

   <ion-label>{{ report_date | date:"yyyy年MM月dd日 (EEE)" }}</ion-label>
   <ion-popover [isOpen]="isPopover" arrow="false" style="--offset-y: -35%;">
     <ng-template>
       <ion-datetime (ionChange)="onChangeDate($event)" showDefaultTitle="true" presentation="date">
         <div slot="title">報告日</div>
       </ion-datetime>
     </ng-template>
   </ion-popover>
   

2. I did the same operation as the video I uploaded to Current Behavior.

Code Reproduction URL

• add ion-datetime on ion-popover

Ionic Info

Ionic:

   Ionic CLI                     : 6.18.1 (C:\Users\Administrator\AppData\Roaming\npm\node_modules\@ionic\cli)
   Ionic Framework               : @ionic/angular 6.0.1
   @angular-devkit/build-angular : 13.0.4
   @angular-devkit/schematics    : 13.0.4
   @angular/cli                  : 13.0.4
   @ionic/angular-toolkit        : 5.0.3

Capacitor:

   Capacitor CLI      : 3.3.3
   @capacitor/android : not installed
   @capacitor/core    : 3.3.3
   @capacitor/ios     : not installed

Utility:

   cordova-res : 0.15.4
   native-run  : 1.5.0

System:

   NodeJS : v14.17.0 (C:\Program Files\nodejs\node.exe)
   npm    : 6.14.13
   OS     : Windows 10

Additional Information

No response

[liamdebeasi]

Glad to hear the fix is working for you! This has been resolved via https://github.com/ionic-team/ionic-framework/pull/24554, and a fix will be available in an upcoming release of Ionic Framework.

[ionitron-bot[bot]]

Thanks for the issue! This issue is being locked to prevent comments that are not relevant to the original issue. If this is still an issue with the latest version of Ionic, please create a new issue and ensure the template is fully filled out.