Difference time between Guyana and Mongolia in hours, minutes, and seconds is [ -12 hours ] with gregorian date today is Monday 8th of December 2025 in Guyanese local time, Where the time now in Guyana is 12:06 PM and the time now in Mongolia is 00:06 AM in Mongolian local time and the time comparison between Co-operative Republic of Guyana and Mongolia in greenwich time ( GMT ) where Guyana late for greenwich time ( GMT -04:00 ) while Mongolia advanced about greenwich time ( GMT +08:00 ).