Q: What is the Time in Ascension Island? Ascension Island follows Greenwich Mean Time (GMT). This means that if it is 20:00 GMT (8 p.m.) during your expedition cruise to Ascension Island, it would be 16:00 (5 p.m.) in New York City, USA, 21:00 (9 p.m.) in London, U.K. and 8:00 (8 a.m.) the following morning in the Antarctic South Pole. Was this article helpful? Yes or No Can't find the answers you're looking for? Contact our support team and we'll personally get back to you as quickly as we can.