Abbreviation Time zone name Other names Offset AST Atlantic Standard Time AST, HNA UTC -4 CDT Cuba Daylight Time UTC -4 CIDST Cayman Islands Daylight Saving Time UTC -4 CIST Cayman Islands Standard Time UTC -5 CST Cuba Standard Time UTC -5 EDT Eastern Daylight Time HAE, EDT UTC -4 EST Eastern Standard Time ET, HNE UTC -5 ET Eastern Time UTC -5:00 / -4:00

---