Holy Experiment Day is celebrated on March 04, 2017. You can use this day to try something religious, like praying for snow in summer. The worst thing to happen would be that your prayers remain unanswered - then everything would stay the way it was. The case would be that they would be answered - then everything would be better than it was. So by taking part in Holy Experiment Day you cannot but win!
The list of things one could try to pray for is endless so Holy Experiment Day suits everyone. You might like to pray for a promotion, your favorite football team or whatever comes to your mind. If you are open minded you can also use Holy Experiment Day to experiment with many different kinds of religions.