What is happiness? Personally I can describe it as a feeling of contentment about everything in ones' life. If you had told me 3 months ago, I would be my happiest today I would have probably slapped you. I was in a dark place in my life, I knew I would get out of it but didn't know when & how. It takes changing one's mindset to making real change in your life.
I've come to realization that happiness is truly an inside job. To look for it outside of ourselves is a losing battle. It's nothing external, it is within us. These are things I wish we were taught in school rather than x+z/a= crap. The quickest way to be happy is to be grateful. When you're grateful, you will never have another bad day in your life ever again. I am not saying bad things won't happen, they will but you'll know to look at them differently and take the lessons it's meant to teach us.
I can honestly say I am the happiest I have ever been in my life & all I had to do was to look within. Happiness is a choice we get to make everyday. It's a great a day to have a great day!