These are three rather different things, even though all of them are related to education.
A curriculum is the set of materials and practices by which students are to achieve a given set of educational objectives. That is, a curriculum is a fairly detailed outline of how you are going to teach a given class. It involves the readings that will be assigned, the lesson plans used to teach the relevant concepts and information, the assessments that will be used, and much more.
A syllabus is typically a more streamlined document. This is a document that tells students what is to be expected of them in a given class. It does briefly outline the course objectives and it informs the students of the general schedule for the class. It typically sets out grading standards, standards of conduct, and other such administrative details. However, it is not as detailed as a curriculum would be.
Finally, a school time table is simply a schedule. This is a document that shows what classes are to be offered and what times, and in what places. It does not say anything about the content of the classes. It merely tells people the basics that they need to know in order to be in the right place at the right time.
A curriculum is the subjects compromising a course of study in a school or college. A syllabus is an outline of the subjects in a course of study or teaching. The difference between curriculum and syllabus is that a syllabus is an outline that is prepared by the instructor while curriculum refers to what is offered by the educational institution rather than the specific instructor. School time is the time spent in school, or the time for beginning a session of school or during which school is held.