It's miserable Monday :: Daily Mail How to think positive on the bleakest day ... Psychologist Cliff Arnall, an expert in depression, has used a mathematical formula to pinpoint today as Blue Monday. Smile! You're not the only one in a bad mood :: Telegraph.co.uk Today is Blue Monday, statistically the most depressing day of the year. Frances Booth tries to find reasons to be cheerful Make the most of ‘Blue Monday’ :: Times Online As if normal Sunday-night back-to-work blues weren’t bad enough, tomorrow morning we have to brace ourselves for “Blue Monday” – officially the most depressing working day of the year.