Atlantic Standard Time (AST) Atlantic Standard Time Zone Time zone four hours behind Coordinated Universal Time (UTC−04:00), used in eastern Canada, parts of the Caribbean and South America; shifts to ADT (UTC−03:00) where daylight savin…
Azerbaijan Time (AZT) Azerbaijan Time Azerbaijan Time (AZT) is the national time standard at UTC+4. Daylight saving time (AZST, UTC+5) was used until its abolition in March 2016. Includes usage, history, regional conte…
International Date Line Imaginary line near the 180° meridian where the calendar date changes by one day when crossed; it deviates to follow national borders and islands.
