Difference time between Guinea Bissau and Sao Tome and Principe in hours, minutes, and seconds is [ ] with gregorian date today is Thursday 30th of April 2026 in Guinea Bissauan local time, Where the time now in Guinea Bissau is 21:17 PM and the time now in Sao Tome and Principe is 21:17 PM in Sao Tomean local time and the time comparison between Republic of Guinea-Bissau and Sao Tome and Principe in greenwich time ( GMT ) where Guinea Bissau advanced about greenwich time ( GMT +00:00 ) while Sao Tome and Principe he has the same greenwich time ( GMT +00:00 ).