许多人想当然地以为of the day就是“今天的”，其实这是很片面的，其实它含义较多，请看：
1.今天的
How would you like to spend the rest of the day?
（今天的）后半天你打算怎么过？
Why not have the dish of the day?
为什么不吃今天的精选菜？
I seem to have spent most of the day photocopying.
我这一天的大部分时间似乎都花在复印上了。以上三例摘自《牛津高阶英汉双解词典》
Here's a summary of the day's news.
下面是今日新闻简报。
Now, can we move on and discuss the vital business of the day.
现在，我们接着往下讨论今天的重要事宜。以上二例摘自《柯林斯高阶英汉双解学习词典》
We'll be bringing you all the details of the day's events.
我们将为您带来今天各项赛事的所有详情。
2.泛指一天；每天；也指过去的每一天
You should not go out in the heat of the day.
你不应该在天最热的时候外出。
Stay indoors in the middle of the day, when the sun is strongest.
中午阳光最强的时候待在室内。
I always leave a clear desk at the end of the day.
每天工作结束时，我总是把桌上收拾干净不放任何东西。
Lunch is his main meal of the day.
午饭是他的正餐。《牛津高阶英汉双解词典》
There was usually some bread going cheap at the end of the day.
在收市前常常有些面包降价出售。
She thinks she can call me at all hours of the day and night.
她以为她可以不分昼夜随时给我打电话。
3.特指过去的某一天
He was closeted with the President for much of the day.
他与总统闭门进行了几乎大半天的密谈。
I felt free from the cares of the day as soon as I left the building.
我一离开那栋大楼便觉得轻松自在，不再为那天的事烦心了。
I sat quietly, musing on the events of the day.
我静静地坐着，沉思一天中所发生的事。
Commuters were heading homeward at the end of the day.
一天结束时上下班的人们正赶着回家。
At the end of the day we were £ 20 down.
一天下来我们少了20英镑。
By the end of the day we were tired but happy.
一天结束时，我们很累，但很高兴。
4.当今的，当代的
Pessimism seems to be the order of the day.
悲观失望似乎是当今司空见惯的情形。
They are the best pens of the day.
他们是当代的第一流作家。
As far as I know, he is one of the greatest artists of the day.
就我所知，他是当代伟大的艺术家之一。
5.当时的（这种用法的专家翻译的时候都经常出错，就不举例xr人家了）
It formed a fashion of the day.
它形成了当时的风尚。《汉英大词典》
Though the speech was delivered by the Queen, the content was written by the UK government of the day.
尽管此次讲话由女王宣读，但讲话内容是由当时的英国政府起草的。
She was treated at Johns Hopkins Hospital in Baltimore, pretty well by the standards of the day.
她在巴尔的摩的约翰霍普金斯医院接受了治疗，当时的治疗效果非常好。