是on Christmas还是at Christmas?

是on Christmas还是at Christmas? on Chritmas 还是 at Christmas? christmas前面用的介词是at还是on? Christmas Eve前面是用at还是on at Christmas对还是on Christmas对?为什么? 在圣诞节 前用什么介词是on christmas 还是at或in christmas eve前面究竟加介词at 还是 on? Christmas Eve前加in at to还是on ___ Christmas eve填on in 还是at at christmas on Christmas Eve对吗? at Christmas和on Christmas的区别 They plan for coming at Christmas对吗 百度上是They plan on coming at Christmas “在圣诞节”英语怎么说是at Christmas还是on Christmas Day?好像两个都可以吧 at christmas为什么不用on on christmas day?还是 in Christmas day? at Christmas eve or on Christmas eve是那个比较恰当呢?外国人常用哪个? on christmas 还是at christmas我感觉好象都对呢是不是这两种说法都可以啊 ? a Christmas a Christmas Eve前面是加ON还是IN?