Difference time between St Martin and Guinea Bissau in hours, minutes, and seconds is [ -4 hours ] with gregorian date today is Friday 20th of March 2026 in St Martian local time, Where the time now in St Martin is 23:20 PM and the time now in Guinea Bissau is 03:20 AM in Guinea Bissauan local time and the time comparison between Sint Maarten Dutch part and Guinea Bissau in greenwich time ( GMT ) where St Martin late for greenwich time ( GMT -04:00 ) while Guinea Bissau he has the same greenwich time ( GMT +00:00 ).