iCloud Calendar

Hello debramichele,

Welcome to Apple Support Communities. 

We understand that you want the US Holidays to show on iCloud calendar on the iCloud website. We are happy to help.

While you are able to enable US Holidays on your Apple device, there is not a way to do so on the iCloud website. Here’s how to set up iCloud calendar subscriptions here: Use iCloud calendar subscriptions - Apple Support 

"Set up a new iCloud calendar subscription on your Mac

1. In Calendar, choose File > New Calendar Subscription. 
2. Enter the calendar’s web address, then click Subscribe.
3. Enter a name for the calendar and choose a color to help you identify it on your calendar.
4. Choose iCloud from the Location menu, then click OK.

Add your existing calendar subscription to iCloud

If you have a calendar subscription on your Mac that you want to see on your iPhone, iPad, or iPod touch, you can add it to iCloud.

1. Open Calendar.
2. Click the Calendars button in the upper-left hand corner of the window to see your list of calendars.
3. Select the subscribed calendar from the list.
4. In the menu bar, choose Edit > Get Info. 
5. Choose iCloud from the Location menu, then click OK.

Can’t see your calendar subscription?

• Check that your iOS device and Mac are signed in to iCloud with the same Apple ID.
• If you visit iCloud.com or are using Microsoft Outlook, you won't see your subscribed calendars updated with iCloud.
• If you restore your calendars from iCloud.com, you'll need to subscribe to your calendars again."

Please leave Apple feedback here: Product Feedback - Apple

Let us know if you have further questions.

Take care.