- UTC – Coordinated Universal Time
- GMT – Greenwich Mean Time
- BST – British Summer Time
- EST – Eastern Standard Time
- EDT – Eastern Daylight Time
- CST – Central Standard Time
- CDT – Central Daylight Time
- MST – Mountain Standard Time
- MDT – Mountain Daylight Time
- PST – Pacific Standard Time
- PDT – Pacific Daylight Time
- CET – Central European Time
- CEST – Central European Summer Time
- EET – Eastern European Time
- IST – India Standard Time
- JST – Japan Standard Time
- KST – Korea Standard Time
- AEST – Australian Eastern Standard Time
- AEDT – Australian Eastern Daylight Time
- EAT – East Africa Time
- WAT – West Africa Time
- CAT – Central Africa Time
- SAST – South Africa Standard Time
- PKT – Pakistan Standard Time
Time zones
Time zone abbreviations such as EST, GMT and IST: what they mean, their UTC offset and where they are used.