Eastern time
1
- the standard time in a zone including the eastern states of the US and parts of Canada, specifically（美国、加拿大的）东部时间, 尤指：
1.1
- （Eastern Standard Time, 缩略词： EST）, standard time based on the mean solar time at the meridian 75°W, five hours behind GMT东部标准时（西经75°的标准时间, 比格林尼治标准时间迟5个小时）。
1.2
- （Eastern Daylight Time, 缩略词： EDT）Eastern time during daylight saving time, four hours behind GMT东部夏令时（比格林尼治标准时间迟4个小时）。
2
- the standard time in a zone including eastern Australia, based on the mean solar time at the meridian 150°E. It is ten hours ahead of GMT, or nine hours ahead when summer time is observed.（澳大利亚的）东部时间（包括澳大利亚东部的一个标准时区, 为东经150°的标准时间, 比格林尼治标准时间早10个小时, 其夏令时比格林尼治标准时早9个小时）。