Because all longitude lines uses to define time zones meet up at the poles the poles technically fall under all time zones. Antarctica has no official time zone of its own. Because Antarctica has no permanent residents this causes few problems. Research stations can pick whatever time zone they want to follow. For practical reason they tent to follow the time zone of their home country. . Because the sun doesn’t set during the Antarctic summer there is no need for daylight savings time.
Important cities in Antarctica
Antarctica has several timezones, the current time in some important cities in Antarctica is shown below.