Tidssone
- Greenwich Mean Time (GMT), UTC +0
- Ingen sommertid, samme forskjell fra UTC hele året
IANA-id-ene for Greenwich Mean Time er GMT, Africa/Abidjan, Africa/Accra, Africa/Bamako, Africa/Banjul, Africa/Bissau, Africa/Conakry, Africa/Dakar, Africa/Freetown, Africa/Lome, Africa/Monrovia, Africa/Nouakchott, Africa/Ouagadougou, America/Danmarkshavn, Atlantic/Reykjavik og Atlantic/St_Helena.