| Abbreviation | Definition |
|---|---|
| SAST | South Australia Standard Time [UTC + 0930] |
| SKT | Second Kingdom Time |
| SPT | Standard Pokemon Time |
| SST | Singapore Standard Time |
| SST | South Sumatra Time [UTC + 0700] |
| ST | Sidereal Time |
| ST | Sixteen Thirty |
| ST | Standard Time |
| SYOT | Syowa Time (Standard Time) |
| TB | Time Base |
| TDTG | True Date-Time Group |
| TJT | Tajikistan Time [UTC + 0500] |
| TKT | Tokelau Time [UTC - 1000] |
| TM | Time |
| TOE | Time Of Event |
| TRSB | Time Reference Scanning Base |
| TS | Time Stamp |
| TST | Thailand Standard Time |
| TUC | INCORRECT abbreviation for Temps Universel Coordonné (Coordinated Universal Time) see UTC. |
| TZ | Time Zone |