For those of you who were confused about why all the Christians you knew were in a tizzy yesterday, it's not because they were celebrating April 20, rather they were celebrating a Christian holiday known as Easter. Allow me to explain:
Christians believe there is an entity known as "god". It's not clear what makes this entity special, some think it created everything (though it's unclear what created the entity). Some think it is the most powerful entity that exists, and that gives it special rights, like the right to determine what is morally permissible. This belief is important to Easter, as you'll see below. Also, god is a boy, even though it is usually considered noncorporeal (no chromosomes, no penis), so we will refer to it as a he from now on.
God made you perfectly, with full knowledge of everything you would do. For some reason, you don't live up to his standards, though. Not living up to his standard is called a "sin". Because of your sin