Major and Minor Requirements
Every undergraduate student is required to complete a major program of study. Students also have the option to declare a double major or minor, if they are able to demonstrate they can do so within the maximum enrollment terms and credits allowable. Requirements for each major and minor are outlined in the UCSC General Catalog's "Programs and Courses" section.
Declare your major as soon as you have chosen a program and met the major's qualification requirements (if any). Undergraduates must be declared in a major prior to the end of the sophomore year (or equivalent), but there's no reason to wait until the end of the sophomore year -- being declared in a major will ensure you're on the department's radar, and that you are getting all the information you need about opportunities available to you.
A list of the majors and minors offered at UCSC is available in the General Catalog. For information about choosing and qualifying for a major, and the process for declaring a major, see the Academic Planning section of this site.