happy day 快乐的一天；
例句：
Oh, happy day! I made it!
啊，真是愉快的一天！我成功了！
And its not a very happy day for us.
对我们来讲，这天并不愉快。
Give my husband an old motorbike to tinker with and he's as happy as the day is long.
给我丈夫一辆老式摩托车鼓捣，他会很高兴的。
A: Hi, Zhou Ning! Happy Children's Day!
A：嗨,周宁！儿童节快乐！
Well, l certainly call her to say "Happy Mother's Day" and promise that I will visit home soon.
好吧,我当然会打电话给她说"母亲节快乐",并保证我会很快回家。
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