A particular date in the calendar, yeah.

日历中的特定日期， 是的。

Alright, now you know where the customs came from, but do you know why the festival falls on this particular date?

好了，现在你知道了这一风俗的来源，但你知道为什么这个节日会在特定的日期吗？

Absolutely, is there a particular date and time that would suit you ?

A: 当然可以，有适合您的特定日期和时间吗？

I’m going to talk about a particular dating technique. Why? Good dating is a key to good analysis.

我要谈谈一种特殊的约会技巧。为什么？良好的约会是良好分析的关键。