定义一个时期

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How many working days in year 1976?

Here is the detail of the calculation:

Because 1976 is a leap year, it has 366 days.

Let's remove 52 saturdays and 52 sundays. It remains 262 days.

Now, let's remove 3 public holidays that do not fall during a weekend and we obtain 259 working days in 1976.

Here is the list of these 3 public holidays:

1. New Year's Day : 1976年1月1日星期四
2. Good Friday : 1976年4月16日星期五
3. National Day : 1976年8月9日星期一

And here are the 2 public holidays falling on a weekend:

1. Labour Day : 1976年5月1日星期六
2. Christmas Day : 1976年12月25日星期六