The weather's awful, you haven't been paid yet and you've already broken your new year's resolutions.
That's why January 16th is said to be "Blue Monday", the most depressing day of the year.
Thought up by psychologist Cliff Arnall in 2005, it usually falls on the third week after Christmas.
But some believe there are ways to lift your spirits despite the gloom.
Luke Blackall spoke to Dr Itai Ivtzan, a senior lecturer of Positive Psychology at the University of East London.