是说 on May Day 还是说 at May Day啊

是说 on May Day 还是说 at May Day 是说 on May Day 还是说 at May Day啊 是on Thanksgiving Day 还是at Thanksgiving Day 是说 on the Fourth Street 还是说 at the Fourth Street? one day,they will be on your plate,if what scientists say may come 说 May 1st如何说?是May the first 还是May first? 在万圣节是at Halloween还是on Halloween,在儿童节是on children's Day还是at children's Day on和at区别是in a rainy day 还是 at a rainy day why 我们说 on weekend ,at weekend,还是in the weekend （）the birthday party (是on in 还是at 说明下理由)（）the table （on 还是in还是at 说下理由和意思） 到底是at night还是in night顺便说一下at,in,on都在什么情况下用? 英语翻译是这样 We _____ _____ _____ on _____ _____我想说一下Spring Festival是用at,后面有day的才用on on a snowy day还是in a snowy day或者说都可以. May 5th 前面是on 还是in 还是at?为什么?、、.. “在儿童节”是at Children's Day还是on Children's Day 懂英语的人进来一下是at the New Year Day 还是 in the New Year Day?我给忘了,知道的人说一下, in May day?还是on May day?五一节可是7天. 用nwe year day,may day ,children day,teacher day,national day,加in ,at ,on 造句