Indian holiday on my calendar

Holi is a Hindu holiday, not an Indian holiday. There are over three million Hindu citizens in the U.S., three of them are members of Congress. So, Holi is, yes, also a U.S. holiday.

If you don't like the holidays Apple has included on it's U.S. holiday calendar, turn it off and subscribe to one that better meets your needs.

Use iCloud calendar subscriptions - Apple Support

Jill33 wrote:

Thank you! I am surprised then that Jewish holidays or Muslim holidays or Kwanza don’t show up as well.

They do show up in my US Calendar. Kwanzaa is there, as are Passover, Rosh Hashanah, Yom Kippur.

Enjoy your Apple gear!