A default clock window gives you Eastern Standard Time (EST), or, during summer months, Eastern Daylight Time (EDT), in a textual format. Default clock windows use EST and EDT because by default your system runs on Eastern time. You can change the clock window in a variety of ways. First, you can change the format of the clock from textual to analog or digital. Second, you can change the formatting of the time display. Finally, you can display the time in any Default Clock Windows