Looking on the internet deeply has found these results:

happy holidays is the most popular phrase on the web.

happy holiday 111,200,000 results on the web	happy holidays 139,100,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
Have a safe, happy holiday. A private security team stopped him before the virus was although they've chosen to remain anonymous, we here at KCKH want to say thank you and also wish our viewers a happy holiday. And although they've chosen to remain anonymous, we here at KCKH want to say thank you and also wish our viewers a happy holiday. Have a happy holiday, sir. Once again, this is Mike Henry wishing you a safe and happy holiday season. Good evening and happy holiday to our viewers at home, and to the audience at the International Convention Center in Jerusalem. On behalf of bass industries, I'd like to wish you all a very happy holiday. Hi. I just wanted to stop by to wish you a happy holiday, Since you're probably not coming to the faculty party.	It doesn't look like this phrase is very popular! The search could not find any examples on the internet.

happy holiday

111,200,000 results on the web

happy holidays

139,100,000 results on the web

More popular!

Have a safe, happy holiday.
A private security team stopped him before the virus was although they've chosen to remain anonymous, we here at KCKH want to say thank you and also wish our viewers a happy holiday.
And although they've chosen to remain anonymous, we here at KCKH want to say thank you and also wish our viewers a happy holiday.
Have a happy holiday, sir.
Once again, this is Mike Henry wishing you a safe and happy holiday season.
Good evening and happy holiday to our viewers at home, and to the audience at the International Convention Center in Jerusalem.
On behalf of bass industries, I'd like to wish you all a very happy holiday.
Hi. I just wanted to stop by to wish you a happy holiday, Since you're probably not coming to the faculty party.

It doesn't look like this phrase is very popular! The search could not find any examples on the internet.