Winter begins on the shortest day of the year.

冬天从一年中最短的一天开始。

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Which is the shortest day of the year?

一年中哪一天最短？

《牛津词典》

The spa is open from 7:00 a.m. to 9:00 p.m. every day of the year.

温泉区全年从早上7:00到晚上9:00开放。

《柯林斯英汉双解大词典》

But the council says that is because the test can be taken almost every day of the year at more than 400 centers around the world.

VOA: special.2009.01.08

And amazed to the families, the two constellations come together in July of every year ,on the seventh day of the seventh month as the myth goes.

但让两家惊异的是这两个星座,每年7月份都会相聚,在7月7日。

麻省理工公开课 - 媒体、教育、市场课程节选

where i'm working, you know, twelve hours a day for a couple a months of the year.

一年里好几个月我都是每天工作1２个小时。

为什么是会计学呢？ - SpeakingMax英语口语达人

Wikipedia maintains a list of notable births for each day of the year.

FORBES: 10 Ways Tech Helps You Have a Happy Birthday

"For many people, this is the highest sacred day of the year, " he said.

WSJ: In Germany, Some Want to Boogie Every Day of the Year

The negative news pummeled Wall Street on Monday, its worst day of the year.

NPR: Asia Stocks Sink On Global Growth Worries