Eastern Standard Time is the same as the time in ニューヨーク when ニューヨーク is on standard time, and the time in ニューヨーク より 1 時間 だけ遅いです when ニューヨーク is on daylight saving time.
Eastern Standard Time does not change between summer time and winter time.
The IANA time zone identifiers for Eastern Standard Time are America/Atikokan, America/Jamaica と America/Panama.