Difference time between Guinea Bissau and Greece in hours, minutes, and seconds is [ -3 hours ] with gregorian date today is Wednesday 21st of October 2026 in Guinea Bissauan local time, Where the time now in Guinea Bissau is 06:49 AM and the time now in Greece is 09:49 AM in Greek local time and the time comparison between Republic of Guinea-Bissau and Greece in greenwich time ( GMT ) where Guinea Bissau advanced about greenwich time ( GMT +00:00 ) while Greece advanced about greenwich time ( GMT +03:00 ).