The term Blue Monday has been around since 2005 when the UK travel company - Sky Travel - revealed the date in a press release having calculated it through an "equation".
Its influencing factors include everything from the distance from Christmas and the level of debt to failed New Year's resolutions and the wintery weather.
So we've come up with a bunch of things you can do on Blue Monday to keep your spirits up.
5. Take a hike
Take a hike up Rivington Pike - one of the north of England's best viewpoints. The historic tower is reputed to date as far back as far as 1138 and boasts breath-taking views of Rivington and beyond.
6. Enjoy nature
Explore the flagship Brockholes Nature Reserve in Preston and enjoy observing the wide variety of wildlife that call it home.
7. Bring him sunshine
Pay Eric's statue a visit in Morecambe and stroll along the prom. If there's one fella guaranteed to put a smile on your face on Blue Monday it's Eric Morecambe.
8. Tower above the rest
Take a yomp up to Jubilee Tower on Darwen Hill, opened in 1898 to commemorate Queen Victoria’s 60 years on the throne. Views from the top can stretch as far afield as the Isle of Man, North Wales and Derbyshire.