The annual "Blue Monday" is nearly upon us. This is the name given to the third Monday in January, coined as the most depressing day of the year. Blue Monday has been around since 2005, when a UK travel company claimed to have established the date through an “equation”. But the term “blue Monday” dates way back to the 1830’s - American literature referred to the “hungover state” of the labour workforce after a weekend spent drinking and associated the colour blue with a dep