It’s not just what you do when you come into the office that counts anymore, but instead it’s when you get there that makes the biggest impression.

According to a new study from the University of Washington’s Foster School of Business, employers find workers who start work earlier in the morning to be more conscientious than those that come in later, even if they’re both working for the same amount of hours.

You may have seen studies pointing to the success of offices that allow their workers to choose their own hours, but this new study suggests that your boss is still paying attention to what hours you’re working.

By asking 149 supervisors to rate an employee’s performance, the study concluded that supervisors were more likely to rate employees who came into work at 5 a.m. as being more conscientious, giving them higher performance ratings than those who came in at 9:45 a.m.

However, bosses who worked later hours themselves were less inclined to display a “morning-bias.”

So instead of dressing for the job you want, try waking up for the job you want and see how it affects your relationship with your boss. Let’s hope he’s not a morning person, because to be honest, it’s pretty hard to get out of bed at 2am every morning- even though when Glenn and I get into the studio we get to talk with our fabulous listeners!