Blue Monday. January 23 is the most depressing day of the year, according to one scientist.
Psychologist Dr Cliff Arnall has weighed up the influence of a number of January-specific phenomena to explain why many of us get the blues at this time of the year.
The Cardiff University expert has come to his conclusion by taking into account miserable weather, mounting debt, the length of time since Christmas, failed New Year's resolutions, a lack of motivation and a need to take action.
Keeping fit and active is one of the keys to staying happy at this time of year, he says.
The Community Service Volunteers (CSV) Make A Difference Day, have suggested people can beat the blues by getting involved with charitable organisations.
Their research indicates that half of people who have volunteered for more than two years feel less depressed and 63% of 25 to 34-year-olds say they feel less stressed after volunteering.
Dr Arnall backed up the findings.
He said: "Keeping physically and mentally active can often improve your state of mind and helping others can sometimes boost self esteem. Volunteering, especially if done on a regular basis, is a great way to feel happier and healthier."
Throw some shapes and get over it.