Lots of us try to maintain a fund for emergencies, for when something goes wrong.
This is, of course, eminently sensible, but there are lots of positive reasons to be saving as well.
Having a "sunny day" fund means that you can make the most of the opportunities that life throws up. It means that you can be spontaneous and live life to the fullest, because you have the resources to do so. Most importantly it means that that you can give yourself the things and experiences that you want without getting into debt.
Every now and again you will run into the bargain of a lifetime. You will run across something being sold for the most ridiculously knocked down price. A sunny day fund will mean that you are able to swoop and bag that bargain for yourself. This could mean saving huge amounts of money, or being able to have things that there is no way you would be able to afford otherwise.
Having the cash to hand for when a bargain crops up means that you can use the bad economic climate to your advantage. Perhaps you can stock up on items in a going out of business sale, or get a great deal on a car from somebody who is emigrating and needs a quick sale.
How many times have you found out that an old friend or a relative living far away is getting married and wished you could have gone to the wedding? If this hasn't happened to you at all you must be young, give it time and sooner or later you will get to that time when everybody seems to be getting hitched and the summer months have a wedding every other weekend.
If you have money set aside for happy contingencies the fact that your cousins wedding is in Australia won't have to hold you back. You will be able to get yourself there to get a slice of the cake, no problem.
To a lot of people the news that they are about to become a parent can come as something of a shock. This is normal, as is worrying about the money side of things once the initial shock worn off.
Anyone with kids will tell you, having a family is an even bigger drain on your finances than running a car or funding a gambling habit. Knowing there a little money put aside will help you relax a bit more and enjoy the good news if it comes along.
There are as many reasons to have money put away in a savings account for a happy day as there are grains of sand on the beach.
Possibly the beach you are able to lie on after you have been able to snap up that last minute heavily discounted trip to the Bahamas!