Bob Geldof famously sang about his dislike of Mondays, but it appears that most people find Tuesday the most miserable day of the week.
Conventional wisdom has been turned on its head by researchers at the London School of Economics, who have been monitoring the moodswings of 22,000 people.
Over a two-month period volunteers have been registering their state of mind with the help of an iPhone application called Mappiness.
The results have shown that Tuesday is when most people are at their lowest ebb.
“It seems plausible that on Monday the weekend has not quite worn off,” said George MacKerron, of LSE's Department of Geography and Environment, who is running the project.
“By Tuesday they are well into the working week and the following weekend is not yet in sight.”
The information has been gathered by sending an alert to volunteers’ iPhones twice a day.
They are asked how they feel, who they are with, whether they are at home and what they are doing.
Their exact position is logged at the same time by satellite – using the same technology as employed in car navigation systems.
This also enabled researchers to discover the happiest – and indeed unhappiest – places in the country.
Thus far Bournemouth is the happiest place in the country, with 82pc of respondents seeming pretty content.
Life is rather less cheerful in the City of London, Eastbourne and Slough, where the Office comedy series was set.
Much could be learned from the research, Mr MacKerron added.
“By tracking across space as well as time, and by making novel use of a technology that millions of people already carry with them, we hope to find better answers to questions about the impacts of natural beauty, environmental problems – maybe even aspects of climate – on individual and national wellbeing.”