According to new research, working Brits are most productive and alert at 11:33am on a Tuesday morning. Typically, the average worker spends Monday trying to recover from the weekend's events, feeling tired and hung-over.
The first day of the week is also spent trawling through emails and arranging to-do lists.
But by Tuesday, 93 per cent of folk claim they are at the top of their game, feeling more awake and organised.
A spokesman for Arm & Hammer Brilliant Sparkle, which conducted the poll of 3,000 employees said: 'The majority of Brits clock in with Monday morning blues at the beginning of the week, and the combination of a heavy weekend and a heavy workload mean it is difficult to focus on anything.
'But by Tuesday, workers are at their highest performance wise - managing to shift the majority of their tasks, shine in meetings, and impress clients with their efficiency.
'Unfortunately things start to dip again by Wednesday as the enthusiasm wears off slightly and folk begin to focus on the social events of the following weekend.'
The poll shows two thirds of people feel over-tired on a Monday because of all the things they have crammed into their weekend. And when they enter the office on the first day of the week, workers spend at least half an hour making coffee, reading the papers and chatting to colleagues about their social arrangements.
Nearly half of working Brits admit they spend the early part of the week organising their workload and getting their head around what has to be done.
But by a Tuesday the majority of people are on the ball, and at the pinnacle of their working week. Four in 10 will schedule meetings for the second day of the week knowing they will be more able to focus and more professional then.