Looking on the internet deeply has found these results:

In the holidays is the most popular phrase on the web.

On the holidays 14,200,000 results on the web	In the holidays 14,460,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
Flying alone on the holidays is like Chatroulette. There's a soup kitchen that Sam and I help out on the holidays. I'm not saying I want kids, but if we did... I used to imagine... we'd all be together on the holidays, Christmas... all around this big fire. And I'll be home on the holidays. Trying To Take Advantage Of Her On The Holidays. On the holidays, they get... like, $1 to $2 bonus here and there. There's nothing sadder than a young guy checking into the hospital on the holidays. Thinks it makes up for the fact that I don't see him on the holidays.	We'll expect you in the holidays In the holidays, he went to stay with some people in Suffolk. He'll be back in the holidays. It's a freezer I use for overflow to store geese and turkeys in the holidays. He used to come out with us sometimes in the holidays. Perhaps in the holidays. In the holidays, I boarded with a family in Suffolk. She's still coming in the holidays?

On the holidays

14,200,000 results on the web

In the holidays

14,460,000 results on the web

More popular!

Flying alone on the holidays is like Chatroulette.
There's a soup kitchen that Sam and I help out on the holidays.
I'm not saying I want kids, but if we did... I used to imagine... we'd all be together on the holidays, Christmas... all around this big fire.
And I'll be home on the holidays.
Trying To Take Advantage Of Her On The Holidays.
On the holidays, they get... like, $1 to $2 bonus here and there.
There's nothing sadder than a young guy checking into the hospital on the holidays.
Thinks it makes up for the fact that I don't see him on the holidays.