Difference time between Guinea Bissau and St Martin in hours, minutes, and seconds is [ +4 hours ] with gregorian date today is Wednesday 21st of October 2026 in Guinea Bissauan local time, Where the time now in Guinea Bissau is 06:50 AM and the time now in St Martin is 02:50 AM in St Martian local time and the time comparison between Republic of Guinea-Bissau and St Martin in greenwich time ( GMT ) where Guinea Bissau advanced about greenwich time ( GMT +00:00 ) while St Martin late for greenwich time ( GMT -04:00 ).