edt

EDT most commonly refers to Eastern Daylight Time, the daylight saving time observed on the eastern part of North America. During this period, clocks are set one hour ahead of Coordinated Universal Time (UTC-4). When daylight saving time is not in effect, the region uses Eastern Standard Time (EST), which is UTC-5.

Geographic usage includes the United States, Canada, and parts of the Caribbean and Mexico that observe daylight saving time. Not all areas within these regions observe DST uniformly; some jurisdictions, such as most of Arizona in the United States and parts of Canada like Saskatchewan, do not observe DST and remain on standard time year-round.

Timekeeping details: In the United States and Canada, daylight saving time typically begins on the second Sunday in March and ends on the first Sunday in November. Clocks are moved forward one hour in spring and back one hour in autumn, effectively shifting the local time relative to UTC.

Other uses: EDT is also an acronym for terms in other fields, such as estimated delivery time in e-commerce, or various technology and design contexts. Because abbreviations can be ambiguous across regions and disciplines, it is important to determine the intended meaning from context and to avoid assuming a specific time standard without clarification.