有两种表示方法：1.on Christmas day；2.at Christmas。例句：1.We had a good time at Christmas.我们圣诞节过得很愉快。2.We had a party on Christmas Day.圣诞节我们开了个晚会。
Christmas例句
1、The day after Christmas is generally a busy one for retailers
圣诞节后的那一天零售商一般都比较忙。
2、During the Christmas holidays there's a tremendous amount of traffic between the Northeast and Florida
在圣诞假日期间，东北地区和佛罗里达州之间的交通十分繁忙。
3、Merry Christmas, Mom.
妈妈，圣诞快乐！
4、He'll be in the hospital over Christmas, so we'll be spending our Christmas Day there.
圣诞期间他在医院，所以圣诞节那天我们会在医院过。
5、We exchanged addresses and Christmas cards
我们交换了地址和圣诞贺卡。