Calendar

Hi parsa146,

Thank you for participating in the Apple Support Communities. Based on the screenshot you shared, it looks like you are subscribed to the calendar that is in the Chinese language. You can unsubscribe if needed. After unsubscribing, you should be able to see the US holidays in English as expected. This article has the steps: Delete spam calendars and events on iPhone

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How to remove calendar spam on your iPhone in iOS 14.6 or later

1. Open the Calendars app. 
2. Tap the unwanted Calendar event.
3. Tap Unsubscribe from this Calendar at the bottom of the screen.
4. To confirm, tap Unsubscribe. 

How to remove calendar spam on your iPhone in earlier versions of iOS

1. Open the Calendar app.
2. At the bottom of the screen, tap Calendars.
3. Look for a calendar that you don't recognize. Tap the More Info button  next to that calendar, then scroll down and tap Delete Calendar.

If this doesn't fix the issue, delete the calendar subscription in Settings:

1. Open the Settings app.
2. Tap Calendar > Accounts. Or if you use iOS 13, tap Passwords & Accounts > Accounts instead.
3. Tap Subscribed Calendars.
4. Look for a calendar that you don't recognize. Tap it, then tap Delete Account.

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Take care.

Thanks for getting back to us parsa146,

The holiday calendar is based on your region, as explained at Use the Holidays calendar on iPhone - Apple Support. So if you go to Settings > General > Language & Region, make sure that your region is set for the US.

You are able to add calendars for other regions by following these steps:

1. Tap Calendars at the bottom of the screen.
2. Tap Add Calendar, then tap Add Holiday Calendar.
3. Tap the holiday calendar you want to subscribe to, then tap Add.

Cheers!

Hi parsa146,

What happens when you attempt to delete the calendar? You can follow the steps here to do so: Delete spam calendars and events on iPhone - Apple Support

"How to remove calendar spam on your iPhone in iOS 14.6 or later

1. Open the Calendars app. 
2. Tap the unwanted Calendar event.
3. Tap Unsubscribe from this Calendar at the bottom of the screen.
4. To confirm, tap Unsubscribe."

We look forward to your reply.

Kind regards.