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{{Short description|Daylight-saving time four hours behind Coordinated Universal Time}}

'''Eastern Daylight Time''' ('''EDT''') is the daylight-saving time used in the [[Eastern Time Zone]] of [[North America]]. It is four hours behind [[Coordinated Universal Time]] and is written as [[UTC−4]] or UTC−04:00. When it is 12:00 UTC, it is 08:00 EDT.

EDT is the daylight-saving counterpart of [[Eastern Standard Time]] (EST), which uses [[UTC−5]]. Areas that observe [[daylight saving time]] move from EST to EDT when the seasonal clock change begins.<ref name="dst-operation"/>

== Use ==
Eastern Daylight Time is used seasonally in Eastern Time jurisdictions that observe daylight saving time. The exact transition dates and clock times are determined by each jurisdiction.<ref name="dst-global"/>

Some locations use UTC−4 throughout the year under another time-zone name. EDT applies specifically to the daylight-saving period of Eastern Time.<ref name="time-zone-utc"/>

== Time offset and daylight saving time ==
EDT is calculated by subtracting four hours from UTC. Thus, 08:00 UTC corresponds to 04:00 EDT. At 02:00 UTC, local EDT is 22:00 on the previous day.

When daylight saving time begins, clocks in participating Eastern Time jurisdictions advance by one hour. The offset changes from UTC−5 to UTC−4. When daylight saving time ends, clocks return to EST and UTC−5.<ref name="dst-operation"/>

EDT and UTC−4 describe related but different concepts. EDT is a named civil time used seasonally, while UTC−4 describes only the numerical difference from UTC.<ref name="time-zone-utc"/>

== See also ==
* [[Eastern Standard Time]]
* [[Eastern Time Zone]]
* [[Coordinated Universal Time]]
* [[Daylight saving time]]
* [[UTC−4]]
* [[UTC−5]]
* [[Time zone]]

== References ==
{{Reflist|refs=
<ref name="dst-operation">"[[Daylight saving time#Operation|Operation]]". ''Daylight saving time''. ''Vrienden Universe Wiki''.</ref>
<ref name="dst-global">"[[Daylight saving time#Global use|Global use]]". ''Daylight saving time''. ''Vrienden Universe Wiki''.</ref>
<ref name="time-zone-utc">"[[Time zone#Relationship with UTC|Relationship with UTC]]". ''Time zone''. ''Vrienden Universe Wiki''.</ref>
}}

[[Category:Time zones]]
[[Category:UTC offsets]]

Eastern Daylight Time - Revision history

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