Calendars are a time-defined set of visits and events that can be applied to various functions within Velos eResearch. Calendars establish patient visit and administrative action timing, costs, an event/visit matrix, and other important information related to the study calendar. As with the Event Library, when you create a Calendar in the Calendar Library, you are creating a template to use and modify across studies. Altering the copy of the Calendar added directly to a study will not affect the template stored in the library.