What is an itinerary?

An itinerary is a detailed plan for a journey or route, most importantly including a list of places that will be visited, in order of visit. You can think of it as a journal or diary of a trip. It may contain travel arrangement details including dates, and may also include information about what you might need to bring, directions you might need to take if you are traveling on your own, and other useful information.
An itenerary is a list of the things you are going to do, together with the times you are going to do them in.