| Clue | Source | Date |
|---|---|---|
| Periods for appointments * | The Telegraph Cross Atlantic | 28 May 2025 |
| Openings in a TV schedule | Wall Street Journal | 09 Dec 2024 |
| Schedule openings | Eugene Sheffer | 23 Aug 2021 |
| Assigned delivery periods | The Times Specialist Sunday | 17 Dec 2017 |
| TV schedule openings |