| Clue | Source | Date |
|---|---|---|
| Part of P.S.T. (2 words) | Family Time | 06 Mar 2023 |
| Winter clock setting | The Washington Post | 29 Dec 2020 |
| Winter clock setting | LA Times Daily | 29 Dec 2020 |
| System accounting for the enemy in a locality | The Telegraph Cryptic | 15 Sep 2017 |
| *It's divided into four zones in the contiguous U.S. states | New York Times | 29 Jul 2015 |
| *It's divided into four zones in the contiguous U.S. states | ||
| Part of P.S.T. | ||
| The 75th meridian in the East | ||
| Part of P.S.T. | ||
| The 75th meridian in the east, e.g. | ||
| Norm for clocks. |