Yesterday was the happiest day of the year.

Gosh, didn't notice it considering NYC has had about 30 straight days of rain. From Ananova:

Britons should have plenty to smile about on Friday, 19 June - as it's officially the happiest day of 2009.

Our spirits have apparenty been boosted by the sunny start to summer, the longest days of the year, the nearing of payday - and optimism that Andy Murray could win Wimbledon.

Psychologist Dr Cliff Arnall devised a formula to pinpoint the day we are all most likely to feel the happiest.

And the Cardiff University lecturer said people should forget credit crunch worries because the secret of happiness lies with things which are free.

Dr Arnall, 44, said feel-good sensations are enjoying time with friends and loves ones, appreciating nature in the sunshine and looking forward to the weekend and a holiday.

His complicated mathematic formula is: O + (N x S) + Cpm/T + He.

O = being outdoors and outdoor activity, N = nature, S = social interaction, Cpm = memories of childhood summers and other positive thoughts, T = temperature, and He = excitement about holidays.