MNEMONIC
| Date | Clue |
|---|---|
| 2025-09-10 | "Richard of York gave battle in vain," for the colors of the rainbow |
| 2022-12-26 | Memory device like "How I wish I could calculate pi," e.g. |
| 2018-05-12 | "Thirty days hath September ...," e.g. |
| 2017-12-30 | Loss prevention association? |
| 2014-07-10 | "Every good boy does fine," e.g. |