ALMANACS
| Date | Clue |
|---|---|
| 2016-08-27 | Often-replaced reference works |
| 2016-08-18 | Yearbooks? |
| 2011-05-14 | Targets of fact-finding missions? |
| 2008-11-13 | Output from Benjamin Franklin's press |
| 2007-04-06 | Data recorders |
| 2002-01-13 | Popular references |
| 1998-12-31 | Astronomical data providers |