| Clue | Source | Date |
|---|---|---|
| 1:30 or 2:30, e.g. | New York Times | 17 Jan 2024 |
| 30 minutes after the hour | Eugene Sheffer | 06 Apr 2021 |
| Thirty after the hour | ||
| Thirty after the hour | LA Times Daily | 05 Apr 2021 |
| :30 | Newsday | 28 Jun 2020 |
| Mid-hour (first 3 letters + last 1) | Universal | 05 Dec 2019 |
| Mid-hour | ||
| Something-thirty |