Do you know what the 5 pillars of Islam are? Which one pillar do you think is the most difficult to follow if you were Muslim? In my opinion, I think that fasting during the holy month of Ramadan would be the most challenging. There are several reasons why I believe this. First of all, it is every year that you are required to do this, and you start at a very young age. I believe you start fasting around ages 9-11, which honestly is very young to start fasting ALL day. Another reason is because it's all day, from before sun up to sun down. I mean think about it, you wake up around 5 a.m., and you don't get to eat until sun down. That would be very difficult to do, in my opinion. However, I am pretty sure that you get used to fasting every year. These are just my thoughts; and you may disagree with me, but that's okay.