时区
- Greenwich Mean Time (GMT), UTC +0
- 无夏令时，全年 UTC 偏移量不变
Greenwich Mean Time的 IANA 时区标识符有 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 和 Atlantic/St_Helena。