Some of the times.
I read an article not long ago about it being a Jewish thing, but I think they’re taking too much credit. Eating Chinese on Christmas and other holidays when most other restaurants are closed is something I and people I’ve known have been doing for ages. If not Chinese, then ethnic food in general, if it’s open. The main thing is, “it’s open.”
Where I live now the only decent Chinese place nearby is closed on Sundays & holidays so it’s no help at all. I get the Chinese restaurant run by Christian Chinese I guess. Just my luck.
Well, I certainly had the traditional Christmas dinner of my people last Exmas. Next time, I’ll get the fried potstickers, not the steamed ones. Chag Sameach!
Where I used to live, there was a Chinese restaurant very near the JCC. The host there greeted folks in Yiddish.
Old, old joke. Erich Segal made fun of it in Yellow Submarine when a Blue Meanie confronted Jeremy Hilary Boob. “Are you…bluish? You don’t LOOK bluish.”
Arthur Schwartz, the very fine food writer, discusses Jews and Chinese food and Christmas in both New York City Food and Jewish Home Cooking. In the early 20th century, the main cheap restaurants in NYC were Italian and Chinese. Jews felt out of place in the Italian joints because the proprietors would often stick up pics of the Virgin Mary or something. The Chinese places weren’t run by Christians, and if they put pork or shellfish in things, it was cut up small so you couldn’t tell. “If I don’t see otherwise, it’s Kosher.”
You people need a holiday to eat Chinese food? 
I have, because there are only three of us and we like Chinese food. Otherwise I do the whole Thanksgiving type meal again, because we like that, too.
I think we did when we were living in New York (I’m not Jewish, my wife is). My wife’s family actually celebrates Xmas, although they haven’t put up a tree since I’ve known them.
Not Jewish but we do it as often as we can; which has been often enough to become friends with a couple of the other people ducking their families and having some fun for the holiday.
Wait what? Isn’t Chinese food like porky porky pork pork pork? How is that kosher?
Wife has known devout Jews and Muslims who, at work buffets, call ham “smoked salmon.” She gave up trying to be helpful because they would insist, “No, this is smoked salmon.” It’s called The Great Jewish Dilemma by a Jewish friend: free ham.
The pork or shrimp fried rice certainly isn’t kosher. The chicken or beef fried rice could be kosher, for a given definition of kosher. I really don’t care to go into a discussion here and now on what would make a restaurant kosher or not. The short answer to your coment is I wouldn’t expect a chasidic or very orthodox Jew to have Chinese food. A reform or conservative probably would. A moderately orthodox Jew might. It depends on how strictly they observe the laws defining Kosher.
The last band I was in, our drummer had a daytime job as the Rabbi at the local Jewish old folks home. He was conservative and when I asked him about Chinese food, he said there’s a sort of exemption for Chinese restaurants, but don’t mention it to Rabbi Name of Rabbi of local Orthodox congregation. It’s sort of like that joke that ends with “And Baptists don’t recognize each other when they’re waiting in line to pay the cashier at the liquor store.”
Any day we eat Chinese food is a holiday. 
Apart from the Jews, there’s also another billion or so people who tend to have Chinese food on Christmas day.
Tabby_Cat, all I can say is that you should read the first article I linked to. It says the following:
> “Chinese restaurants were the easiest place to trick yourself into thinking you were
> eating Kosher food,” Ed Schoenfeld, the owner of RedFarm, one of the most
> laureled Chinese restaurants in New York, said. Indeed, it was something of a
> perfect match. Jewish law famously prohibits the mixing of milk and meat just as
> Chinese food traditionally excludes dairy from its dishes.
“Closer to Kosher food than many cuisines” does not mean “Kosher.”
levdrakon writes:
> I read an article not long ago about it being a Jewish thing, but I think they’re
> taking too much credit. Eating Chinese on Christmas and other holidays when
> most other restaurants are closed is something I and people I’ve known have been
> doing for ages.
Unless you’re much older than I think you are, this Jewish tradition started before you and the people you know began doing the same thing. It started in the early part of the twentieth century in New York.
Sure, but do they get a fortune cookie?
It’s not. But not every Jew keeps kosher.
Every Thanksgiving, and some Christmases, my partner, our son, and I take Amtrak from Portland ME to Boston and have dim sum in Chinatown. Once or twice we went the traditional route and that was enough for our son, and certainly for us. 
(No, we are not Jewish.)