Today is known as Blue Monday - it's grey outside, Christmas is over, money is running out before January payday and we may have over indulged in unhealthy food and drink during the festive season.
But workers are being challenged to defy the blues and dress in bright shades to help combat what many believe to be the most miserable day of the year.
The third Monday of January is said to be the most depressing day of the year, thanks to a combination of bad weather, increased debt and poor diet in the aftermath of the festive season.
A poll by charity Mental Health Research UK found one in five of us will not wear bright clothes to work because we think others believe they are less professional.
But the charity is calling on members of the public to wear colourful clothes as part of its Blooming Monday campaign.
The campaign aims to raise awareness of depression and seasonal affective disorder, which particularly prevalent in the winter months because it is caused by a lack of sunlight.
A spokesman for the charity said: "The concept of the campaign is simple; we ask everyone to wear their brightest clothes that day. Even if workplaces usually require sombre attire, we hope that on this one day a year employees will be encouraged to brighten up. We hope to make a big visual impact on Blue Monday each year by injecting some unexpected colour and joy. Instead of Blue Monday, it will become Blooming Monday! Ditch the greys and drab attire - wear bright clothes for charity on Blue Monday!"
Are you wearing something bright for Blooming Monday today? Or is still Blue Monday for you? Comment below or email firstname.lastname@example.org