Human trials have indicated an inverse relationship between blood lead level and calcium intake. While milk isn’t an antidote to let’s say, lead poisoning, the dietary calcium inhibits the lead absorption. This sort of poisoning is incredibly dangerous to the systems of the human body, and the ingredients within the milk help to defend against it. The purpose of the milk is to dilute the ingested poison.
The term calendar is for the whole term in school. What classes you would take, where they are at, what you're doing in each class throughout the term. The weekly schedule will be used for what assignments need to be turned into each class that week. The daily organizer will be what you're doing in each class that day. What you will be taking about what assignments you will be doing. It will also be for what classes you will be going through that day.