If you've got the Monday blues, you're not alone - today is the most depressing day of the year, according to research by a former Cardiff University psychologist.
Cliff Arnall created a mathematical formula to identify elements contributing to a general feeling of 'mid-winter blues.'
He found a combination of bad weather, broken new year's resolutions and post-Christmas debt conspire to make one Monday in January 'Blue Monday' - although accounts sometimes differ as to which date this is.
This year it's said to be January 21st - and experts say the added effect of economic gloom and doom means today could apparently be one of the most miserable Mondays ever.
For those feeling a touch of the winter blues today, experts suggest keeping active, eating well and spending time with loved ones.
Andy Green, of the Flexible Thinking Forum, said: "Monday may symbolically be the year's most depressing day, but it doesn't have to be. By making the most of potential opportunities around us we can transform it into a springboard for a positive happy day."