100 Happy Days was created with the philosophy that being able to appreciate the moment is the root of happiness, so the challenge encourages you to look for the small things about any given day that can turn it into a good day.
To participate in the challenge, you just need to add the hashtag #100happydays and the number of the day to your photo, for example: 'Day #1 [your photo] #100happydays'. You could also add some commentary if you so choose. To officially join the challenge, just register on its website and once you finish you'll receive a file with your whole collection.
71% of the people who start the challenge don't end up finishing it, saying that they don't have the time. Do you have the time to be happy?
You can accept the challenge on Facebook, Instagram, Twitter, Tumblr, or email.