Difference time between French Guiana and Mauritania in hours, minutes, and seconds is [ -3 hours ] with gregorian date today is Saturday 25th of October 2025 in French Guianese local time, Where the time now in French Guiana is 11:59 AM and the time now in Mauritania is 14:59 PM in Mauritanian local time and the time comparison between French Guiana and Mauritania in greenwich time ( GMT ) where French Guiana late for greenwich time ( GMT -03:00 ) while Mauritania he has the same greenwich time ( GMT +00:00 ).