also: クリスマスパーティ
noun
A social gathering held to celebrate Christmas, common in Japan among friends, colleagues, or families.
今年のクリスマスパーティーは友達の家でやる予定です。
We're planning to have this year's Christmas party at a friend's house.
会社のクリスマスパーティーでプレゼント交換を
We did a gift exchange at the office Christmas party.