Difference time between Guinea and United States of America in hours, minutes, and seconds is [ +4 hours ] with gregorian date today is Thursday 20th of August 2026 in Guinean local time, Where the time now in Guinea is 00:02 AM and the time now in United States of America is 20:02 PM in American local time and the time comparison between Republic of Guinea and United States of America in greenwich time ( GMT ) where Guinea advanced about greenwich time ( GMT +00:00 ) while United States of America late for greenwich time ( GMT -04:00 ).