Meaning

noun standard time in the 5th time zone west of Greenwich, reckoned at the 75th meridian; used in the eastern United States

originFrom Middle English este, from Old English ēst (“will, consent, favour”), from Proto-West Germanic *ansti, from Proto-Germanic *anstiz (“favour, affection”), from Proto-Indo-European *ān- (“to notice; face, mouth”) or from *h₃neh₂- (“to bestow, offer, help; to enjoy”). Cognate with Icelandic ást (“affection, love”), Dutch gunst (“favour, grace, courtesy, privilege”), German Gunst (“favour,…

Etymology from Wiktionary, CC BY-SA 3.0