North American time zones:

EDT – Eastern Daylight Time

Time zone offset: UTC - 4 hours

Note that EDT is a daylight saving time/summer time zone. It is generally only used during the summer in the places listed below, during the winter EST is used instead

Time zone abbreviations: EDT, HAE

Email time zone indicator: -0400

An email sent from someone in the EDT time zone will have the time zone listed as "-0400" in the headers of the email. (However, "-0400" does not have to be in EDT, as other time zones could have the same UTC offset).

Where and when is EDT observed?

EDT is used in the summer in these US states (EST during winter)

• Connecticut
• Delaware
• District of Columbia
• Florida - Southern/Eastern parts
  except Bay, Calhoun, Escambia, Holmes, Jackson, Okaloosa, Santa Rosa, Walton and Washington counties and norther Gulf county - look in CST/CDT
• Georgia
• Indiana - all except for these north-western counties near Chicago
  Lake, Porter, La Porte, Newton, Jasper, Starke
  and these south-western counties in Indiana near Evansville
  Gibson, Posey, Vanderburgh, Warrick, Perry
• Kentucky - eastern parts
  counties of Anderson, Bath, Bell, Boone, Bourbon, Boyd, Boyle, Bracken, Breathitt, Bullitt, Campbell, Carroll, Carter, Casey, Clark, Clay, Elliott, Estill, Fayette, Fleming, Floyd, Franklin, Gallatin, Garrard, Grant, Greenup, Hancock, Hansock, Hardin, Harlan, Harrison, Henry, Jackson, Jefferson, Jessamine, Johnson, Kenton, Knott, Knox, Larue, Laurel, Lawrence, Lee, Leslie, Letcher, Lewis, Lincoln, Madison, Magoffin, Marion, Martin, Mason, McCreary, Meade, Menifee, Mercer, Montgomery, Morgan, Nelson, Nicholas, Oldham, Owen, Owsley, Pendleton, Perry, Pike, Powell, Pulaski, Robertson, Rockcastle, Rowan, Scott, Shelby, Spencer, Taylor, Trimble, Washington, Wayne, Whitley, Wolfe, Woodford
• Maine
• Maryland
• Massachusetts
• Michigan - most except these western counties
  Dickinson, Gogebic, Iron, and Menominee - which are on CST/CDT
• New Hampshire
• New Jersey
• New York
• North Carolina
• Ohio
• Pennsylvania
• Rhode Island
• South Carolina
• Tennessee - eastern counties
  Anderson, Blount, Bradley, Campbell, Carter, Claiborne, Cocke, Grainger, Greene, Hamblen, Hamilton, Hancock, Hawkins, Jefferson, Johnson, Knox, Loudon, McMinn, Meigs, Monroe, Morgan, Polk, Rhea, Roane, Scott, Sevier, Sullivan, Unicoi, Union, and Washington
• Vermont
• Virginia
• West Virginia

EDT is used during summer in these Canadian provinces (EST during winter)

• Nunavut - most of it
  except Kugluktuk, Cambridge Bay - CST/CDT and Southampton Island (Coral Harbor) EST all year
• Ontario - most parts east of 90 West and two communities west of 90 West
  Shebandowan, Upsala
  The rest use CST/CDT or only CST
• Quebec - most of it
  except East of 63 West, Blanc Sablon which observe AST all year

Example location in EDT

• New York - during summer

Other time zones in North America

• NST - Newfoundland Standard Time
• NDT - Newfoundland Daylight Time
• AST - Atlantic Standard Time
• ADT - Atlantic Daylight Time
• EST - Eastern Standard Time
• CST - Central Standard Time
• CDT - Central Daylight Time
• MST - Mountain Standard Time
• MDT - Mountain Daylight Time
• PST - Pacific Standard Time
• PDT - Pacific Daylight Time
• AKST - Alaska Standard Time
• AKDT - Alaska Daylight Time
• HAST - Hawaii-Aleutian Standard Time
• HADT - Hawaii-Aleutian Daylight Time

Time zones in other regions

• Australia
• Europe
• Military

Related links

• Time zone abbreviations world-wide
• The World Clock - Time Zones - current time around the world
• The World Clock - Time Zone Converter - Convert between time zones
• World Clock - North America - current time in North America