What time we start and finish work is a much more important issue than it used to be. Gone are the days of working standard office hours. More of us are being given a choice of when we work, especially those who work from home. And later starting times in schools have been found to safeguard teenagers’ sleep. One thing is for certain, though: you will never get everyone to agree on what time it is best to start work.

            That said, a new survey has found that two-thirds of people employed in Britain would prefer to start work earlier than the traditional 9am, and finish before 5pm, with 8am-4pm being the most popular working hours. People tend to prefer a late start to their day when they are young. That reflects their biology, not their lifestyle. Between the ages of 14 and 24, our sleep patterns change because our body clock changes, and we wake up two or three hours later than most people. In contrast, people in their 50s have much earlier sleeping and waking times.

            What matters most is not when we start work, but when we have to wake up. More than a quarter (27%) of people in London were found to prefer a later start (after 9am), as the travelling time is likely to be longer if earlier.

            Most of us wake to an alarm, and that is because our working hours do not match our body clocks. Most working hours fit only a few of us, and there is a biological reason for that. Whatever age you are, wherever you live, and whatever job you have, your body clock controls how you feel every hour of the day. Unsurprisingly, body clocks are different for different people, making some prefer early mornings and some nights. These differences between body clocks can mean that “very early-morning people” wake up at 5am or earlier, just as “very late-night people” are going to sleep.

            So when it comes to start times for work, there is no one-size-fits-all solution – quite the opposite. The fairest starting time is probably 10am – that would protect most people’s sleep and maximise their work performance, but it would still disadvantage some workers.

(1) Why are starting and finishing hours becoming an important issue?

A. Workers are working harder than before.

B. Working hours are getting more flexible.

C. Everyone has agreed on the best working times.

D. Waking up early is good for teenagers.

(2) What can we infer about working in London?

A. The traffic is bad in the early morning.

B. Most workers start late in the morning.

C. The travelling time is longer than in other cities.

D. Londoners don’t like working late.

(3) According to the passage, how you feel every hour of the day depends on __________.

A. your working hours	B. where you live
C. what you do	D. your body clock