Which time zone is UTC -5 hours?

The correct choice, Eastern Daylight Time (EDT), is UTC -5 hours because it reflects the time observed during the daylight saving period in the eastern part of the United States and Canada. During EDT, clocks are set one hour ahead of Eastern Standard Time (EST), which is UTC -5. This adjustment is made to extend evening daylight in the summer months.

In contrast, Atlantic Daylight Time (ADT) operates at UTC -4, which is applicable during the daylight saving time in regions like eastern Canada. Mountain Daylight Time (MDT) is UTC -6, used in regions that experience daylight saving time in the mountain time zone, while Pacific Standard Time (PST) is UTC -8 and adjusts to Pacific Daylight Time (PDT) during daylight saving time at UTC -7. Hence, the only time zone that corresponds to UTC -5 is Eastern Daylight Time (EDT).