Difference time between United States of America and Mauritania in hours, minutes, and seconds is [ -4 hours ] with gregorian date today is Thursday 21st of May 2026 in American local time, Where the time now in United States of America is 02:14 AM and the time now in Mauritania is 06:14 AM in Mauritanian local time and the time comparison between United States of America and Mauritania in greenwich time ( GMT ) where United States of America late for greenwich time ( GMT -04:00 ) while Mauritania he has the same greenwich time ( GMT +00:00 ).