If you participate you must fast (give up) from bitterness, lying, a bad attitude, being disrespectful, hateful and so on. In other words, you will not act negatively. This is a chance to be an even more positive person that you are now.
Send me a note to let me know how you did and if you participated. Hopefully, you will have encouraged someone else to give up a negative behavior or two.
I must confess that there is not an International Day of Fasting. I made it up. However, maybe we can help make the world a little bit better by giving some nasty behaviors. You can go to this link to find a helpful guide on fasting if you want to do a true fast.