It's a date. 一言为定

It's a date. 用于和比较亲密的朋友约定某件事情。It's a date. 属于较随便的表达，可以拉近彼此之间的距离。但不太适合用在较正式的场合。另外，男性之间也不使用这种说法。

Scene 1

A：Would you like to have Sichuan food with me?愿意和我一起去吃川菜吗？

B：It sounds good. So what time? 听起来不错，几点钟？

A：How about 5:30?5点半如何？

B：It's a date.一言为定。

Scene 2

A：When will you finish your work tonight?今晚几点下班？

B：By 8 o'clock.8点以前吧。

A：Then afterwards, why don't we go for a drink at the Shanghai Hotel?

这样吧，我们约好稍后在上海宾馆喝一杯，如何？

B：OK,it's a date.好呀，就这么说定了。

Scene 3

A：Are you free on Saturday morning?周六有空吗？

B：Yes, I am.是的。

A：How about going to the New Appearance Photo Room to take some photos?那么我们约好一起去新形象照相馆照像，如何？

B：Good idea! It's a date.好主意，就这么办。

Scene 4

A: Let's meet tomorrow morning at the front door of the supermarket around 8 o'clock, OK? 明天早晨8：00超市门口见，好吗？

B：It's a date.就这么说定了。