Windows 10: Win 10 calendar with holidays

My laptop's calendar lists US holidays, but my desktop does not and I'm completely baffled as to why. They're both running the public version of Windows 10 Home with all current updates. FWIW I have two other desktops with Insider builds 19624 and their calendars don't show holidays either. I want to add the holiday display to my other PCs, but I can't figure out what I need to do. I don't remember doing anything different on the laptop, but obviously something is different! All these are Dells of one type or another.

I'm including a picture of the laptop's calendar display below. Notice that the option to display the holidays is listed under a Yahoo category, but much searching and trying things has failed to enlighten me. : If some kind soul could help clue me in about how to add the holidays to the Win 10 calendar, I'd be most appreciative. TIA




:)

 

How to add a new Holiday Calendar in Outlook?

Trying to add additional holiday calendar to my Outlook Calendar on Win 10 as per :

Add, view, and remove a holiday calendar in Calendar for Windows 10

In my Outlook on the Web holiday calendar option is missing on the drop down list.

Original title: New Holiday Calendar

 

Holiday Calendar

Here is the list of holiday calendars you can add to your Windows Live account. Choose a country (and language if applicable) and you will be taken
to that calendar. On the top-left of the calendar is "subscribe to this calendar". Click this and the calendar will be added to your Windows Live account. The next time the phone syncs with Windows Live, the option for Holiday calendars will appear.

 

I can't find the holiday calendar

It's not there. That's the problem. I can see the US Holidays in the Gear Icon, but nothing else.