London: January 19 has been marked as the "blue Monday" of 2015 as it is going to be the unhappiest day of the year.

Experts have predicted it to be the biggest downer for Christmas revellers, based on the following factors: weather conditions, debt level (the difference between debt accumulated and our ability to pay), time since Christmas, time since failing our new year's resolutions, low motivational levels and the feeling of a need to take action, the Daily Star reported.

Those attempting Dry January are likely to reach the end of their tether by Monday. And many stubbing out the cigarettes will be puffing away again come the end of the weekend.

Plus those who enjoyed the festive period with their spouse are more likely to be talking with their solicitors than their partners.

So experts at the British Dietetic Association (BDA) have offered keen eaters a way out to fight the sorrow.

Diet expert Alison Clark from the BDA said that comfort eating can help people get through the blue Monday but only if they don't go overboard.

Whereas those looking for an instant energy boost have been told to stay clear of too much caffeine and stick to the nutrients to bring a bit of joy on Blue Monday.