可数，但是on my holiday和on my holidays常通用。例句：This is a great holiday resort that is full of life.这里生气勃勃，是一个绝妙的度假胜地。

例句

1、You'll need ￡ 200 minimum for your holiday expenses.

你需要200英镑作为你假日的最低开销。

2、The school will be closed Monday because it's a holiday.

星期一是公共假日，所以学校不上课。

3、I've got three days' holiday including New Year's Day.

包括元旦在内我有三天假。

4、We won't get another chance of a holiday this year.

我们今年不会再有机会度假了。

5、The package includes 20 days' paid holiday a year.

这一揽子福利包括每年20天的带薪假。