| Abbreviation | Definition |
|---|---|
| BCE | Before Common Era |
| BCE | Before the Christian Era |
| BNT | Brunei Darussalam Time |
| BOT | Bolivia Time |
| BRST | Brasilia Summer Time |
| BRT | Bras??lia time |
| BRT | Brasília time |
| BST | Bangladesh Standard Time |
| BST | Bering Strait Time [UTC - 1100] |
| BST | Brazil Standard Time [UTC - 0300] |
| BST | British Standard Time [UTC + 0100] |
| BST | British Summer Time [UTC + 0100] |
| BT | Baghdad Time [UTC + 0300] |
| BT | Bering Time [UTC - 1100] |
| BTT | Bhutan Time |
| CAST | Casey Time |
| CAT | Central African Time |
| CAT | Central Alaska Time [UTC - 1000] |
| CCS | CauCasus Time |
| CCT | China Coast Time [UTC + 0800] |