| Abbreviation | Definition |
|---|---|
| VTZ | Greenland Eastern Standard Time [UTC - 0200] |
| VUT | Vanuatu Time [UTC + 1100] |
| WAAS | Wide Area Augmentation System |
| WAST | Western Australian Standard Time [UTC + 0800] |
| WAT | West Africa Time [UTC - 0100] |
| WCT | West Coast Time |
| WDT | Western European Daylight Time (UTC + 0100) |
| WEDT | Western European Daylight Time [UTC + 0100] |
| WEST | Western Europe Summer Time |
| WET | Western European Time [UTC + 0000] |
| WEZ | Westeuropaische Zeit ( Western European Time) [UTC + 0000] |
| WGST | West Greenland Summer Time [UTC - 0200] |
| WGT | West Greenland Time [UTC - 0300] |
| WIB | Waktu Indonesia Barat (West Indonesian Standard Time) |
| WIST | Western Indonesia Standard Time [UTC + 0700] |
| WITA | Waktu Indonesia Tengah time [UTC + 0800] |
| WST | (Western) Samoan Time [from 2011-12-30; UTC +1300] |
| WST | Western Australian Standard Time [UTC + 0800] |
| WST | Western Brazil Standard Time [UTC - 0400] |
| WT | Watch Time |