You'd like to know what you call a party that is for celebrating Christmas? It is usually known as 'a Christmas party'. 'Party' is a word which means different things in different situations - to different people. It could simply be a 'gathering' or 'get-together' of people for a meal or drinks.....or it could range to an extravagant dance with love music and buffet.
"We're having a quiet Christmas get-together at my place on Monday."
クリスマスパーティーの言い方を知りたいということですね。普通は 'a Christmas party' といいます。
'Party' は状況、あるいは人によって意味するものが変わってきます。単なる「食事会」「飲み会」も 'Party' ですし「ビュッフェ付きの贅沢なダンスパーティー」も 'Party' です。
"We're having a quiet Christmas get-together at my place on Monday."
（月曜日に私の家で小さなクリスマスパーティーを開きます）
Christmas = クリスマス
party = パーティー
get-together = 集まり
A party that is thrown to celebrate Christmas is called: "Christmas Party", "A Christmas celebration" or "Xmas Party".
Example sentence: I can not wait for the Christmas party, it means I can celebrate with lots of different people.
「クリスマスパーティー」は "Christmas Party" "A Christmas celebration" または "Xmas Party" と言えます。
例文：
I can not wait for the Christmas party, it means I can celebrate with lots of different people.
（クリスマスパーティーが待ちきれない。いろいろな人とお祝いできるから）
こんにちは。
「クリスマスパーティー」は英語でもそのまま Christmas party と言うことができます。
日本語のように「クリパ」とは略しません。
下記は例文ですのでぜひ参考にしてください。
Do you want to join us for our Christmas party next week?
来週のクリスマスパーティーにあなたも来ませんか？
"Christmas party."
This is the most common way to talk about a party which celebrates Christmas.
"Christmas do."
A 'do' is an informal way of referring to a party. For example, you can also say 'leaving do' to talk about a leaving party.
1. A Christmas celebration.
2. A Xmas gathering.
3. A Christmas banquet.
The words Christmas and Xmas are used interchangeably.
This means that either one or the other is acceptable to use.
A celebration or gathering is a party with good food and lots
of drink where people get together to celebrate the birth of
Jesus Christ (as in the Christian faith), or it is the name of the
annual office party held in December. A Christmas banquet
is what you call a very formal Christmas dinner.
Christmas is celebrated on December 25th in most countries around the world. Many people have parties around Christmas time. These parties are commonly called Christmas parties or Christmas bash.
A Christmas party more British version of saying, whereas, Xmas party more spread in the US. "The best time of the year is Christmas party with the whole family!"
イギリスでは "Christmas party" といいます。
"Xmas party" はアメリカでよく使われる言い方です。
例：
"The best time of the year is Christmas party with the whole family!"（家族がみんなそろうクリスマスパーティーは1年で一番楽しい時間です）
A party that is for celebrating Christmas is commonly referred to as a "Christmas party" and sometimes may be referred to as a "Christmas event" or "Christmas celebration". You may use these terms in a sentence in the following ways:
-I am responsible for planning the Christmas party at work.
-We usually have a Christmas tree lighting event in our city on the 23rd of December.
イギリス 
アメリカ合衆国 
南アフリカ 
カナダ 
